diff --git a/package.json b/package.json
index e5ff0ca4..e627ffa6 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "eslint-plugin-react": "7.5.1",
     "extract-text-webpack-plugin": "3.0.2",
     "file-loader": "2.0.0",
-    "image-webpack-loader": "3.6.0",
+    "image-webpack-loader": "4.3.1",
     "jest": "21.2.1",
     "json-loader": "0.5.7",
     "markdown-it-anchor": "4.0.0",
diff --git a/yarn.lock b/yarn.lock
index 15d8aced..44d7acc5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1097,6 +1097,10 @@ balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
 
+base64-js@0.0.8:
+  version "0.0.8"
+  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-0.0.8.tgz#1101e9544f4a76b1bc3b26d452ca96d7a35e7978"
+
 base64-js@^1.0.2:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.2.1.tgz#a91947da1f4a516ea38e5b4ec0ec3773675e0886"
@@ -1131,7 +1135,7 @@ big.js@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/big.js/-/big.js-3.1.3.tgz#4cada2193652eb3ca9ec8e55c9015669c9806978"
 
-bin-build@^2.0.0:
+bin-build@^2.0.0, bin-build@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/bin-build/-/bin-build-2.2.0.tgz#11f8dd61f70ffcfa2bdcaa5b46f5e8fedd4221cc"
   dependencies:
@@ -1143,6 +1147,16 @@ bin-build@^2.0.0:
     tempfile "^1.0.0"
     url-regex "^3.0.0"
 
+bin-build@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/bin-build/-/bin-build-3.0.0.tgz#c5780a25a8a9f966d8244217e6c1f5082a143861"
+  dependencies:
+    decompress "^4.0.0"
+    download "^6.2.2"
+    execa "^0.7.0"
+    p-map-series "^1.0.0"
+    tempfile "^2.0.0"
+
 bin-check@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/bin-check/-/bin-check-2.0.0.tgz#86f8e6f4253893df60dc316957f5af02acb05930"
@@ -1225,6 +1239,10 @@ bonjour@^3.5.0:
     multicast-dns "^6.0.1"
     multicast-dns-service-types "^1.1.0"
 
+boolbase@^1.0.0, boolbase@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
+
 boom@2.x.x:
   version "2.10.1"
   resolved "https://registry.yarnpkg.com/boom/-/boom-2.10.1.tgz#39c8918ceff5799f83f9492a848f625add0c766f"
@@ -1329,10 +1347,29 @@ bser@^2.0.0:
   dependencies:
     node-int64 "^0.4.0"
 
+buffer-alloc-unsafe@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz#bd7dc26ae2972d0eda253be061dba992349c19f0"
+
+buffer-alloc@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/buffer-alloc/-/buffer-alloc-1.2.0.tgz#890dd90d923a873e08e10e5fd51a57e5b7cce0ec"
+  dependencies:
+    buffer-alloc-unsafe "^1.1.0"
+    buffer-fill "^1.0.0"
+
 buffer-crc32@~0.2.3:
   version "0.2.13"
   resolved "https://registry.yarnpkg.com/buffer-crc32/-/buffer-crc32-0.2.13.tgz#0d333e3f00eac50aa1454abd30ef8c2a5d9a7242"
 
+buffer-fill@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/buffer-fill/-/buffer-fill-1.0.0.tgz#f8f78b76789888ef39f205cd637f68e702122b2c"
+
+buffer-from@^0.1.1:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-0.1.2.tgz#15f4b9bcef012044df31142c14333caf6e0260d0"
+
 buffer-indexof@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/buffer-indexof/-/buffer-indexof-1.1.0.tgz#f54f647c4f4e25228baa656a2e57e43d5f270982"
@@ -1350,6 +1387,14 @@ buffer-xor@^1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/buffer-xor/-/buffer-xor-1.0.3.tgz#26e61ed1422fb70dd42e6e36729ed51d855fe8d9"
 
+buffer@^3.0.1:
+  version "3.6.0"
+  resolved "http://registry.npmjs.org/buffer/-/buffer-3.6.0.tgz#a72c936f77b96bf52f5f7e7b467180628551defb"
+  dependencies:
+    base64-js "0.0.8"
+    ieee754 "^1.1.4"
+    isarray "^1.0.0"
+
 buffer@^4.3.0:
   version "4.9.1"
   resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
@@ -1461,6 +1506,15 @@ caw@^1.0.1:
     object-assign "^3.0.0"
     tunnel-agent "^0.4.0"
 
+caw@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/caw/-/caw-2.0.1.tgz#6c3ca071fc194720883c2dc5da9b074bfc7e9e95"
+  dependencies:
+    get-proxy "^2.0.0"
+    isurl "^1.0.0-alpha5"
+    tunnel-agent "^0.6.0"
+    url-to-options "^1.0.1"
+
 center-align@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/center-align/-/center-align-0.1.3.tgz#aa0d32629b6ee972200411cbd4461c907bc2b7ad"
@@ -1548,12 +1602,6 @@ circular-json@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.3.1.tgz#be8b36aefccde8b3ca7aa2d6afc07a37242c0d2d"
 
-clap@^1.0.9:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/clap/-/clap-1.2.0.tgz#59c90fe3e137104746ff19469a27a634ff68c857"
-  dependencies:
-    chalk "^1.1.3"
-
 class-utils@^0.3.5:
   version "0.3.6"
   resolved "https://registry.yarnpkg.com/class-utils/-/class-utils-0.3.6.tgz#f93369ae8b9a7ce02fd41faad0ca83033190c463"
@@ -1609,9 +1657,9 @@ co@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
 
-coa@~1.0.1:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/coa/-/coa-1.0.3.tgz#1b54a5e1dcf77c990455d4deea98c564416dc893"
+coa@~2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/coa/-/coa-2.0.1.tgz#f3f8b0b15073e35d70263fb1042cb2c023db38af"
   dependencies:
     q "^1.1.2"
 
@@ -1701,6 +1749,13 @@ concat-stream@^1.4.6, concat-stream@^1.4.7, concat-stream@^1.5.0:
     readable-stream "^2.2.2"
     typedarray "^0.0.6"
 
+config-chain@^1.1.11:
+  version "1.1.12"
+  resolved "https://registry.yarnpkg.com/config-chain/-/config-chain-1.1.12.tgz#0fde8d091200eb5e808caf25fe618c02f48e4efa"
+  dependencies:
+    ini "^1.3.4"
+    proto-list "~1.2.1"
+
 connect-history-api-fallback@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/connect-history-api-fallback/-/connect-history-api-fallback-1.3.0.tgz#e51d17f8f0ef0db90a64fdb47de3051556e9f169"
@@ -1723,7 +1778,7 @@ constants-browserify@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/constants-browserify/-/constants-browserify-1.0.0.tgz#c20b96d8c617748aaf1c16021760cd27fcb8cb75"
 
-content-disposition@0.5.2:
+content-disposition@0.5.2, content-disposition@^0.5.2:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz#0cf68bb9ddf5f2be7961c3a85178cb85dba78cb4"
 
@@ -1830,7 +1885,7 @@ cross-spawn@^5.0.1:
     shebang-command "^1.2.0"
     which "^1.2.9"
 
-cross-spawn@^6.0.5:
+cross-spawn@^6.0.0, cross-spawn@^6.0.5:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
   dependencies:
@@ -1878,6 +1933,19 @@ css-loader@1.0.0:
     postcss-value-parser "^3.3.0"
     source-list-map "^2.0.0"
 
+css-select-base-adapter@~0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/css-select-base-adapter/-/css-select-base-adapter-0.1.0.tgz#0102b3d14630df86c3eb9fa9f5456270106cf990"
+
+css-select@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/css-select/-/css-select-2.0.0.tgz#7aa2921392114831f68db175c0b6a555df74bbd5"
+  dependencies:
+    boolbase "^1.0.0"
+    css-what "2.1"
+    domutils "^1.7.0"
+    nth-check "^1.0.1"
+
 css-selector-tokenizer@^0.7.0:
   version "0.7.0"
   resolved "https://registry.yarnpkg.com/css-selector-tokenizer/-/css-selector-tokenizer-0.7.0.tgz#e6988474ae8c953477bf5e7efecfceccd9cf4c86"
@@ -1886,16 +1954,37 @@ css-selector-tokenizer@^0.7.0:
     fastparse "^1.1.1"
     regexpu-core "^1.0.0"
 
+css-tree@1.0.0-alpha.28:
+  version "1.0.0-alpha.28"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha.28.tgz#8e8968190d886c9477bc8d61e96f61af3f7ffa7f"
+  dependencies:
+    mdn-data "~1.1.0"
+    source-map "^0.5.3"
+
+css-tree@1.0.0-alpha.29:
+  version "1.0.0-alpha.29"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha.29.tgz#3fa9d4ef3142cbd1c301e7664c1f352bd82f5a39"
+  dependencies:
+    mdn-data "~1.1.0"
+    source-map "^0.5.3"
+
+css-url-regex@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/css-url-regex/-/css-url-regex-1.1.0.tgz#83834230cc9f74c457de59eebd1543feeb83b7ec"
+
+css-what@2.1:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.0.tgz#9467d032c38cfaefb9f2d79501253062f87fa1bd"
+
 cssesc@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/cssesc/-/cssesc-0.1.0.tgz#c814903e45623371a0477b40109aaafbeeaddbb4"
 
-csso@~2.3.1:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/csso/-/csso-2.3.2.tgz#ddd52c587033f49e94b71fc55569f252e8ff5f85"
+csso@^3.5.0:
+  version "3.5.1"
+  resolved "https://registry.yarnpkg.com/csso/-/csso-3.5.1.tgz#7b9eb8be61628973c1b261e169d2f024008e758b"
   dependencies:
-    clap "^1.0.9"
-    source-map "^0.5.3"
+    css-tree "1.0.0-alpha.29"
 
 cssom@0.3.x, "cssom@>= 0.3.2 < 0.4.0":
   version "0.3.2"
@@ -1913,11 +2002,11 @@ currently-unhandled@^0.4.1:
   dependencies:
     array-find-index "^1.0.1"
 
-cwebp-bin@^3.1.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/cwebp-bin/-/cwebp-bin-3.2.0.tgz#ae02df453d8c15341b1d8d499a5226bcf3bf4a6f"
+cwebp-bin@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/cwebp-bin/-/cwebp-bin-4.0.0.tgz#ee2b7f6333d3426fb52bb405fa6f2ec8b62894f4"
   dependencies:
-    bin-build "^2.0.0"
+    bin-build "^2.2.0"
     bin-wrapper "^3.0.1"
     logalot "^2.0.0"
 
@@ -1983,6 +2072,12 @@ decode-uri-component@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
 
+decompress-response@^3.2.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/decompress-response/-/decompress-response-3.3.0.tgz#80a4dd323748384bfa248083622aedec982adff3"
+  dependencies:
+    mimic-response "^1.0.0"
+
 decompress-tar@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/decompress-tar/-/decompress-tar-3.1.0.tgz#217c789f9b94450efaadc5c5e537978fc333c466"
@@ -1994,6 +2089,14 @@ decompress-tar@^3.0.0:
     through2 "^0.6.1"
     vinyl "^0.4.3"
 
+decompress-tar@^4.0.0, decompress-tar@^4.1.0, decompress-tar@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/decompress-tar/-/decompress-tar-4.1.1.tgz#718cbd3fcb16209716e70a26b84e7ba4592e5af1"
+  dependencies:
+    file-type "^5.2.0"
+    is-stream "^1.1.0"
+    tar-stream "^1.5.2"
+
 decompress-tarbz2@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/decompress-tarbz2/-/decompress-tarbz2-3.1.0.tgz#8b23935681355f9f189d87256a0f8bdd96d9666d"
@@ -2006,6 +2109,16 @@ decompress-tarbz2@^3.0.0:
     through2 "^0.6.1"
     vinyl "^0.4.3"
 
+decompress-tarbz2@^4.0.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/decompress-tarbz2/-/decompress-tarbz2-4.1.1.tgz#3082a5b880ea4043816349f378b56c516be1a39b"
+  dependencies:
+    decompress-tar "^4.1.0"
+    file-type "^6.1.0"
+    is-stream "^1.1.0"
+    seek-bzip "^1.0.5"
+    unbzip2-stream "^1.0.9"
+
 decompress-targz@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/decompress-targz/-/decompress-targz-3.1.0.tgz#b2c13df98166268991b715d6447f642e9696f5a0"
@@ -2017,6 +2130,14 @@ decompress-targz@^3.0.0:
     through2 "^0.6.1"
     vinyl "^0.4.3"
 
+decompress-targz@^4.0.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/decompress-targz/-/decompress-targz-4.1.1.tgz#c09bc35c4d11f3de09f2d2da53e9de23e7ce1eee"
+  dependencies:
+    decompress-tar "^4.1.1"
+    file-type "^5.2.0"
+    is-stream "^1.1.0"
+
 decompress-unzip@^3.0.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/decompress-unzip/-/decompress-unzip-3.4.0.tgz#61475b4152066bbe3fee12f9d629d15fe6478eeb"
@@ -2029,6 +2150,15 @@ decompress-unzip@^3.0.0:
     vinyl "^1.0.0"
     yauzl "^2.2.1"
 
+decompress-unzip@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/decompress-unzip/-/decompress-unzip-4.0.1.tgz#deaaccdfd14aeaf85578f733ae8210f9b4848f69"
+  dependencies:
+    file-type "^3.8.0"
+    get-stream "^2.2.0"
+    pify "^2.3.0"
+    yauzl "^2.4.2"
+
 decompress@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/decompress/-/decompress-3.0.0.tgz#af1dd50d06e3bfc432461d37de11b38c0d991bed"
@@ -2043,6 +2173,19 @@ decompress@^3.0.0:
     vinyl-assign "^1.0.1"
     vinyl-fs "^2.2.0"
 
+decompress@^4.0.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/decompress/-/decompress-4.2.0.tgz#7aedd85427e5a92dacfe55674a7c505e96d01f9d"
+  dependencies:
+    decompress-tar "^4.0.0"
+    decompress-tarbz2 "^4.0.0"
+    decompress-targz "^4.0.0"
+    decompress-unzip "^4.0.1"
+    graceful-fs "^4.1.10"
+    make-dir "^1.0.0"
+    pify "^2.3.0"
+    strip-dirs "^2.0.0"
+
 deep-equal@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.0.1.tgz#f5d260292b660e084eff4cdbc9f08ad3247448b5"
@@ -2192,10 +2335,32 @@ doctrine@^2.1.0:
   dependencies:
     esutils "^2.0.2"
 
+dom-serializer@0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/dom-serializer/-/dom-serializer-0.1.0.tgz#073c697546ce0780ce23be4a28e293e40bc30c82"
+  dependencies:
+    domelementtype "~1.1.1"
+    entities "~1.1.1"
+
 domain-browser@^1.1.1:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/domain-browser/-/domain-browser-1.1.7.tgz#867aa4b093faa05f1de08c06f4d7b21fdf8698bc"
 
+domelementtype@1:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.3.0.tgz#b17aed82e8ab59e52dd9c19b1756e0fc187204c2"
+
+domelementtype@~1.1.1:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.1.3.tgz#bd28773e2642881aec51544924299c5cd822185b"
+
+domutils@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/domutils/-/domutils-1.7.0.tgz#56ea341e834e06e6748af7a1cb25da67ea9f8c2a"
+  dependencies:
+    dom-serializer "0"
+    domelementtype "1"
+
 download@^4.0.0, download@^4.1.2:
   version "4.4.3"
   resolved "https://registry.yarnpkg.com/download/-/download-4.4.3.tgz#aa55fdad392d95d4b68e8c2be03e0c2aa21ba9ac"
@@ -2216,6 +2381,22 @@ download@^4.0.0, download@^4.1.2:
     vinyl-fs "^2.2.0"
     ware "^1.2.0"
 
+download@^6.2.2:
+  version "6.2.5"
+  resolved "https://registry.yarnpkg.com/download/-/download-6.2.5.tgz#acd6a542e4cd0bb42ca70cfc98c9e43b07039714"
+  dependencies:
+    caw "^2.0.0"
+    content-disposition "^0.5.2"
+    decompress "^4.0.0"
+    ext-name "^5.0.0"
+    file-type "5.2.0"
+    filenamify "^2.0.0"
+    get-stream "^3.0.0"
+    got "^7.0.0"
+    make-dir "^1.0.0"
+    p-event "^1.0.0"
+    pify "^3.0.0"
+
 duplexer2@0.0.2:
   version "0.0.2"
   resolved "https://registry.yarnpkg.com/duplexer2/-/duplexer2-0.0.2.tgz#c614dcf67e2fb14995a91711e5a617e8a60a31db"
@@ -2228,6 +2409,10 @@ duplexer2@^0.1.4, duplexer2@~0.1.0:
   dependencies:
     readable-stream "^2.0.2"
 
+duplexer3@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/duplexer3/-/duplexer3-0.1.4.tgz#ee01dd1cac0ed3cbc7fdbea37dc0a8f1ce002ce2"
+
 duplexify@^3.1.2, duplexify@^3.4.2:
   version "3.5.1"
   resolved "https://registry.yarnpkg.com/duplexify/-/duplexify-3.5.1.tgz#4e1516be68838bc90a49994f0b39a6e5960befcd"
@@ -2326,7 +2511,7 @@ error-ex@^1.2.0:
   dependencies:
     is-arrayish "^0.2.1"
 
-es-abstract@^1.5.1:
+es-abstract@^1.5.1, es-abstract@^1.6.1:
   version "1.12.0"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.12.0.tgz#9dbbdd27c6856f0001421ca18782d786bf8a6165"
   dependencies:
@@ -2514,7 +2699,7 @@ espree@^4.0.0:
     acorn "^5.6.0"
     acorn-jsx "^4.1.1"
 
-esprima@^2.6.0, esprima@^2.7.1:
+esprima@^2.7.1:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
 
@@ -2605,6 +2790,18 @@ exec-sh@^0.2.0:
   dependencies:
     merge "^1.1.3"
 
+execa@^0.10.0:
+  version "0.10.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-0.10.0.tgz#ff456a8f53f90f8eccc71a96d11bdfc7f082cb50"
+  dependencies:
+    cross-spawn "^6.0.0"
+    get-stream "^3.0.0"
+    is-stream "^1.1.0"
+    npm-run-path "^2.0.0"
+    p-finally "^1.0.0"
+    signal-exit "^3.0.0"
+    strip-eof "^1.0.0"
+
 execa@^0.5.0:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/execa/-/execa-0.5.1.tgz#de3fb85cb8d6e91c85bcbceb164581785cb57b36"
@@ -2629,6 +2826,18 @@ execa@^0.7.0:
     signal-exit "^3.0.0"
     strip-eof "^1.0.0"
 
+execa@^0.8.0:
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-0.8.0.tgz#d8d76bbc1b55217ed190fd6dd49d3c774ecfc8da"
+  dependencies:
+    cross-spawn "^5.0.1"
+    get-stream "^3.0.0"
+    is-stream "^1.1.0"
+    npm-run-path "^2.0.0"
+    p-finally "^1.0.0"
+    signal-exit "^3.0.0"
+    strip-eof "^1.0.0"
+
 executable@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/executable/-/executable-1.1.0.tgz#877980e9112f3391066da37265de7ad8434ab4d9"
@@ -2705,6 +2914,19 @@ express@^4.16.2:
     utils-merge "1.0.1"
     vary "~1.1.2"
 
+ext-list@^2.0.0:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/ext-list/-/ext-list-2.2.2.tgz#0b98e64ed82f5acf0f2931babf69212ef52ddd37"
+  dependencies:
+    mime-db "^1.28.0"
+
+ext-name@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/ext-name/-/ext-name-5.0.0.tgz#70781981d183ee15d13993c8822045c506c8f0a6"
+  dependencies:
+    ext-list "^2.0.0"
+    sort-keys-length "^1.0.0"
+
 extend-shallow@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-2.0.1.tgz#51af7d614ad9a9f610ea1bafbb989d6b1c56890f"
@@ -2825,6 +3047,12 @@ fd-slicer@~1.0.1:
   dependencies:
     pend "~1.2.0"
 
+fd-slicer@~1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/fd-slicer/-/fd-slicer-1.1.0.tgz#25c7c89cb1f9077f8891bbe61d8f390eae256f1e"
+  dependencies:
+    pend "~1.2.0"
+
 figgy-pudding@^3.1.0, figgy-pudding@^3.5.1:
   version "3.5.1"
   resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.1.tgz#862470112901c727a0e495a80744bd5baa1d6790"
@@ -2856,14 +3084,22 @@ file-loader@2.0.0:
     loader-utils "^1.0.2"
     schema-utils "^1.0.0"
 
-file-type@^3.1.0:
+file-type@5.2.0, file-type@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/file-type/-/file-type-5.2.0.tgz#2ddbea7c73ffe36368dfae49dc338c058c2b8ad6"
+
+file-type@^3.1.0, file-type@^3.8.0:
   version "3.9.0"
   resolved "https://registry.yarnpkg.com/file-type/-/file-type-3.9.0.tgz#257a078384d1db8087bc449d107d52a52672b9e9"
 
-file-type@^4.1.0:
+file-type@^4.1.0, file-type@^4.3.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/file-type/-/file-type-4.4.0.tgz#1b600e5fca1fbdc6e80c0a70c71c8dba5f7906c5"
 
+file-type@^6.1.0:
+  version "6.2.0"
+  resolved "https://registry.yarnpkg.com/file-type/-/file-type-6.2.0.tgz#e50cd75d356ffed4e306dc4f5bcf52a79903a919"
+
 filename-regex@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/filename-regex/-/filename-regex-2.0.1.tgz#c1c4b9bee3e09725ddb106b75c1e301fe2f18b26"
@@ -2872,6 +3108,10 @@ filename-reserved-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/filename-reserved-regex/-/filename-reserved-regex-1.0.0.tgz#e61cf805f0de1c984567d0386dc5df50ee5af7e4"
 
+filename-reserved-regex@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/filename-reserved-regex/-/filename-reserved-regex-2.0.0.tgz#abf73dfab735d045440abfea2d91f389ebbfa229"
+
 filenamify@^1.0.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/filenamify/-/filenamify-1.2.1.tgz#a9f2ffd11c503bed300015029272378f1f1365a5"
@@ -2880,6 +3120,14 @@ filenamify@^1.0.1:
     strip-outer "^1.0.0"
     trim-repeated "^1.0.0"
 
+filenamify@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/filenamify/-/filenamify-2.1.0.tgz#88faf495fb1b47abfd612300002a16228c677ee9"
+  dependencies:
+    filename-reserved-regex "^2.0.0"
+    strip-outer "^1.0.0"
+    trim-repeated "^1.0.0"
+
 fileset@^2.0.2:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/fileset/-/fileset-2.0.3.tgz#8e7548a96d3cc2327ee5e674168723a333bba2a0"
@@ -3035,6 +3283,10 @@ front-matter@^3.0.0:
   dependencies:
     js-yaml "^3.10.0"
 
+fs-constants@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/fs-constants/-/fs-constants-1.0.0.tgz#6be0de9be998ce16af8afc24497b9ee9b7ccd9ad"
+
 fs-readdir-recursive@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs-readdir-recursive/-/fs-readdir-recursive-1.0.0.tgz#8cd1745c8b4f8a29c8caec392476921ba195f560"
@@ -3111,6 +3363,12 @@ get-proxy@^1.0.1:
   dependencies:
     rc "^1.1.2"
 
+get-proxy@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/get-proxy/-/get-proxy-2.1.0.tgz#349f2b4d91d44c4d4d4e9cba2ad90143fac5ef93"
+  dependencies:
+    npm-conf "^1.1.0"
+
 get-stdin@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-4.0.1.tgz#b968c6b0a04384324902e8bf1a5df32579a450fe"
@@ -3257,7 +3515,26 @@ got@^5.0.0:
     unzip-response "^1.0.2"
     url-parse-lax "^1.0.0"
 
-graceful-fs@^4.0.0, graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4:
+got@^7.0.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/got/-/got-7.1.0.tgz#05450fd84094e6bbea56f451a43a9c289166385a"
+  dependencies:
+    decompress-response "^3.2.0"
+    duplexer3 "^0.1.4"
+    get-stream "^3.0.0"
+    is-plain-obj "^1.1.0"
+    is-retry-allowed "^1.0.0"
+    is-stream "^1.0.0"
+    isurl "^1.0.0-alpha5"
+    lowercase-keys "^1.0.0"
+    p-cancelable "^0.3.0"
+    p-timeout "^1.1.1"
+    safe-buffer "^5.0.1"
+    timed-out "^4.0.0"
+    url-parse-lax "^1.0.0"
+    url-to-options "^1.0.1"
+
+graceful-fs@^4.0.0, graceful-fs@^4.1.10, graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
@@ -3370,6 +3647,16 @@ has-gulplog@^0.1.0:
   dependencies:
     sparkles "^1.0.0"
 
+has-symbol-support-x@^1.4.1:
+  version "1.4.2"
+  resolved "https://registry.yarnpkg.com/has-symbol-support-x/-/has-symbol-support-x-1.4.2.tgz#1409f98bc00247da45da67cee0a36f282ff26455"
+
+has-to-string-tag-x@^1.2.0:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/has-to-string-tag-x/-/has-to-string-tag-x-1.4.1.tgz#a045ab383d7b4b2012a00148ab0aa5f290044d4d"
+  dependencies:
+    has-symbol-support-x "^1.4.1"
+
 has-unicode@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
@@ -3577,35 +3864,35 @@ ignore@^4.0.6:
   version "4.0.6"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
 
-image-webpack-loader@3.6.0:
-  version "3.6.0"
-  resolved "https://registry.yarnpkg.com/image-webpack-loader/-/image-webpack-loader-3.6.0.tgz#3dcf652238ba39440cadd325aa602e7e0f2afe54"
+image-webpack-loader@4.3.1:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/image-webpack-loader/-/image-webpack-loader-4.3.1.tgz#71b15714c509faaadd3effbdcc072ba2787b2957"
   dependencies:
-    imagemin "^5.2.2"
-    imagemin-gifsicle "^5.1.0"
-    imagemin-mozjpeg "^6.0.0"
+    imagemin "^5.3.1"
+    imagemin-gifsicle "^5.2.0"
+    imagemin-mozjpeg "^7.0.0"
     imagemin-optipng "^5.2.1"
-    imagemin-pngquant "^5.0.0"
-    imagemin-svgo "^5.2.1"
-    imagemin-webp "^4.0.0"
+    imagemin-pngquant "^5.1.0"
+    imagemin-svgo "^6.0.0"
+    imagemin-webp "^4.1.0"
     loader-utils "^1.1.0"
     object-assign "^4.1.1"
 
-imagemin-gifsicle@^5.1.0:
-  version "5.1.0"
-  resolved "https://registry.yarnpkg.com/imagemin-gifsicle/-/imagemin-gifsicle-5.1.0.tgz#2e4ddcda2a109b221cabaec498e1e2dd28ca768f"
+imagemin-gifsicle@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/imagemin-gifsicle/-/imagemin-gifsicle-5.2.0.tgz#3781524c457612ef04916af34241a2b42bfcb40a"
   dependencies:
     exec-buffer "^3.0.0"
     gifsicle "^3.0.0"
     is-gif "^1.0.0"
 
-imagemin-mozjpeg@^6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/imagemin-mozjpeg/-/imagemin-mozjpeg-6.0.0.tgz#71a32a457aa1b26117a68eeef2d9b190c2e5091e"
+imagemin-mozjpeg@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/imagemin-mozjpeg/-/imagemin-mozjpeg-7.0.0.tgz#d926477fc6ef5f3a768a4222f7b2d808d3eba568"
   dependencies:
-    exec-buffer "^3.0.0"
+    execa "^0.8.0"
     is-jpg "^1.0.0"
-    mozjpeg "^4.0.0"
+    mozjpeg "^5.0.0"
 
 imagemin-optipng@^5.2.1:
   version "5.2.1"
@@ -3615,30 +3902,32 @@ imagemin-optipng@^5.2.1:
     is-png "^1.0.0"
     optipng-bin "^3.0.0"
 
-imagemin-pngquant@^5.0.0:
-  version "5.0.1"
-  resolved "https://registry.yarnpkg.com/imagemin-pngquant/-/imagemin-pngquant-5.0.1.tgz#d8a329da553afa226b11ce62debe0b7e37b439e6"
+imagemin-pngquant@^5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/imagemin-pngquant/-/imagemin-pngquant-5.1.0.tgz#b9eb563d9e6a3876f6248be0061ba1b0ef269c07"
   dependencies:
-    exec-buffer "^3.0.0"
+    execa "^0.10.0"
     is-png "^1.0.0"
-    pngquant-bin "^3.0.0"
+    is-stream "^1.1.0"
+    pngquant-bin "^4.0.0"
 
-imagemin-svgo@^5.2.1:
-  version "5.2.2"
-  resolved "https://registry.yarnpkg.com/imagemin-svgo/-/imagemin-svgo-5.2.2.tgz#501699f5789730a57922b8736ea15c53f7b55838"
+imagemin-svgo@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/imagemin-svgo/-/imagemin-svgo-6.0.0.tgz#2dd8c82946be42a8e2cbcae3c5bf007bc2b8b9e8"
   dependencies:
+    buffer-from "^0.1.1"
     is-svg "^2.0.0"
-    svgo "^0.7.0"
+    svgo "^1.0.0"
 
-imagemin-webp@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/imagemin-webp/-/imagemin-webp-4.0.0.tgz#a2caf32b5f52ad21b949a6fed8efc901daf7249d"
+imagemin-webp@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/imagemin-webp/-/imagemin-webp-4.1.0.tgz#effd00160d8456b95cbde5fd26c32d64b0318062"
   dependencies:
-    cwebp-bin "^3.1.0"
+    cwebp-bin "^4.0.0"
     exec-buffer "^3.0.0"
-    is-cwebp-readable "^1.0.0"
+    is-cwebp-readable "^2.0.1"
 
-imagemin@^5.2.2:
+imagemin@^5.3.1:
   version "5.3.1"
   resolved "https://registry.yarnpkg.com/imagemin/-/imagemin-5.3.1.tgz#f19c2eee1e71ba6c6558c515f9fc96680189a6d4"
   dependencies:
@@ -3685,6 +3974,10 @@ inherits@2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.1.tgz#b17d08d326b4423e568eff719f91b0b1cbdf69f1"
 
+ini@^1.3.4:
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
+
 ini@~1.3.0:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.4.tgz#0537cb79daf59b59a1a517dff706c86ec039162e"
@@ -3791,11 +4084,11 @@ is-ci@^1.0.10:
   dependencies:
     ci-info "^1.0.0"
 
-is-cwebp-readable@^1.0.0:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/is-cwebp-readable/-/is-cwebp-readable-1.0.3.tgz#9a8fde2bed77f3417ae9371258c58e2ec3285118"
+is-cwebp-readable@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/is-cwebp-readable/-/is-cwebp-readable-2.0.1.tgz#afb93b0c0abd0a25101016ae33aea8aedf926d26"
   dependencies:
-    file-type "^3.1.0"
+    file-type "^4.3.0"
 
 is-data-descriptor@^0.1.4:
   version "0.1.4"
@@ -3907,6 +4200,10 @@ is-natural-number@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/is-natural-number/-/is-natural-number-2.1.1.tgz#7d4c5728377ef386c3e194a9911bf57c6dc335e7"
 
+is-natural-number@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/is-natural-number/-/is-natural-number-4.0.1.tgz#ab9d76e1db4ced51e35de0c72ebecf09f734cde8"
+
 is-number@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/is-number/-/is-number-2.1.0.tgz#01fcbbb393463a548f2f466cce16dece49db908f"
@@ -3923,6 +4220,10 @@ is-obj@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-obj/-/is-obj-1.0.1.tgz#3e4729ac1f5fde025cd7d83a896dab9f4f67db0f"
 
+is-object@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-object/-/is-object-1.0.1.tgz#8952688c5ec2ffd6b03ecc85e769e02903083470"
+
 is-odd@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-odd/-/is-odd-1.0.0.tgz#3b8a932eb028b3775c39bb09e91767accdb69088"
@@ -3945,6 +4246,10 @@ is-path-inside@^1.0.0:
   dependencies:
     path-is-inside "^1.0.1"
 
+is-plain-obj@^1.0.0, is-plain-obj@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-1.1.0.tgz#71a50c8429dfca773c92a390a4a03b39fcd51d3e"
+
 is-plain-object@^2.0.1, is-plain-object@^2.0.3, is-plain-object@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-2.0.4.tgz#2c163b3fafb1b606d9d17928f05c2a1c38e07677"
@@ -4139,6 +4444,13 @@ istanbul-reports@^1.1.2:
   dependencies:
     handlebars "^4.0.3"
 
+isurl@^1.0.0-alpha5:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/isurl/-/isurl-1.0.0.tgz#b27f4f49f3cdaa3ea44a0a5b7f3462e6edc39d67"
+  dependencies:
+    has-to-string-tag-x "^1.2.0"
+    is-object "^1.0.1"
+
 jest-changed-files@^21.2.0:
   version "21.2.0"
   resolved "https://registry.yarnpkg.com/jest-changed-files/-/jest-changed-files-21.2.0.tgz#5dbeecad42f5d88b482334902ce1cba6d9798d29"
@@ -4397,13 +4709,6 @@ js-yaml@^3.7.0:
     argparse "^1.0.7"
     esprima "^3.1.1"
 
-js-yaml@~3.7.0:
-  version "3.7.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.7.0.tgz#5c967ddd837a9bfdca5f2de84253abe8a1c03b80"
-  dependencies:
-    argparse "^1.0.7"
-    esprima "^2.6.0"
-
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
@@ -4821,6 +5126,10 @@ markdown-it@^8.1.0:
     mdurl "^1.0.1"
     uc.micro "^1.0.3"
 
+mdn-data@~1.1.0:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-1.1.4.tgz#50b5d4ffc4575276573c4eedb8780812a8419f01"
+
 mdurl@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/mdurl/-/mdurl-1.0.1.tgz#fe85b2ec75a59037f2adfec100fd6c601761152e"
@@ -4922,6 +5231,10 @@ miller-rabin@^4.0.0:
   version "1.28.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.28.0.tgz#fedd349be06d2865b7fc57d837c6de4f17d7ac3c"
 
+mime-db@^1.28.0:
+  version "1.36.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.36.0.tgz#5020478db3c7fe93aad7bbcc4dcf869c43363397"
+
 mime-db@~1.27.0:
   version "1.27.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.27.0.tgz#820f572296bbd20ec25ed55e5b5de869e5436eb1"
@@ -4954,6 +5267,10 @@ mimic-fn@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.1.0.tgz#e667783d92e89dbd342818b5230b9d62a672ad18"
 
+mimic-response@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/mimic-response/-/mimic-response-1.0.1.tgz#4923538878eef42063cb8a3e3b0798781487ab1b"
+
 minimalistic-assert@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.0.tgz#702be2dda6b37f4836bcb3f5db56641b64a1d3d3"
@@ -5015,11 +5332,11 @@ move-concurrently@^1.0.1:
     rimraf "^2.5.4"
     run-queue "^1.0.3"
 
-mozjpeg@^4.0.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/mozjpeg/-/mozjpeg-4.1.1.tgz#859030b24f689a53db9b40f0160d89195b88fd50"
+mozjpeg@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/mozjpeg/-/mozjpeg-5.0.0.tgz#b8671c4924568a363de003ff2fd397ab83f752c5"
   dependencies:
-    bin-build "^2.0.0"
+    bin-build "^2.2.0"
     bin-wrapper "^3.0.0"
     logalot "^2.0.0"
 
@@ -5180,6 +5497,13 @@ normalize-path@^2.0.1, normalize-path@^2.1.1:
   dependencies:
     remove-trailing-separator "^1.0.1"
 
+npm-conf@^1.1.0:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/npm-conf/-/npm-conf-1.1.3.tgz#256cc47bd0e218c259c4e9550bf413bc2192aff9"
+  dependencies:
+    config-chain "^1.1.11"
+    pify "^3.0.0"
+
 npm-run-path@^2.0.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-2.0.2.tgz#35a9232dfa35d7067b4cb2ddf2357b1871536c5f"
@@ -5195,6 +5519,12 @@ npmlog@^4.0.2:
     gauge "~2.7.3"
     set-blocking "~2.0.0"
 
+nth-check@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/nth-check/-/nth-check-1.0.1.tgz#9929acdf628fc2c41098deab82ac580cf149aae4"
+  dependencies:
+    boolbase "~1.0.0"
+
 number-is-nan@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/number-is-nan/-/number-is-nan-1.0.1.tgz#097b602b53422a522c1afb8790318336941a011d"
@@ -5257,6 +5587,15 @@ object.pick@^1.3.0:
   dependencies:
     isobject "^3.0.1"
 
+object.values@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/object.values/-/object.values-1.0.4.tgz#e524da09b4f66ff05df457546ec72ac99f13069a"
+  dependencies:
+    define-properties "^1.1.2"
+    es-abstract "^1.6.1"
+    function-bind "^1.1.0"
+    has "^1.0.1"
+
 obuf@^1.0.0, obuf@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/obuf/-/obuf-1.1.1.tgz#104124b6c602c6796881a042541d36db43a5264e"
@@ -5387,6 +5726,12 @@ p-cancelable@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/p-cancelable/-/p-cancelable-0.3.0.tgz#b9e123800bcebb7ac13a479be195b507b98d30fa"
 
+p-event@^1.0.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/p-event/-/p-event-1.3.0.tgz#8e6b4f4f65c72bc5b6fe28b75eda874f96a4a085"
+  dependencies:
+    p-timeout "^1.1.1"
+
 p-finally@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
@@ -5413,6 +5758,12 @@ p-locate@^3.0.0:
   dependencies:
     p-limit "^2.0.0"
 
+p-map-series@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-map-series/-/p-map-series-1.0.0.tgz#bf98fe575705658a9e1351befb85ae4c1f07bdca"
+  dependencies:
+    p-reduce "^1.0.0"
+
 p-map@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/p-map/-/p-map-1.1.1.tgz#05f5e4ae97a068371bc2a5cc86bfbdbc19c4ae7a"
@@ -5421,6 +5772,16 @@ p-pipe@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/p-pipe/-/p-pipe-1.1.0.tgz#2e9dc7cc57ce67d2ce2db348ca03f28731854075"
 
+p-reduce@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-reduce/-/p-reduce-1.0.0.tgz#18c2b0dd936a4690a529f8231f58a0fdb6a47dfa"
+
+p-timeout@^1.1.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/p-timeout/-/p-timeout-1.2.1.tgz#5eb3b353b7fce99f101a1038880bb054ebbea386"
+  dependencies:
+    p-finally "^1.0.0"
+
 p-try@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.0.0.tgz#85080bb87c64688fa47996fe8f7dfbe8211760b1"
@@ -5582,12 +5943,13 @@ pluralize@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-7.0.0.tgz#298b89df8b93b0221dbf421ad2b1b1ea23fc6777"
 
-pngquant-bin@^3.0.0:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/pngquant-bin/-/pngquant-bin-3.1.1.tgz#d124d98a75a9487f40c1640b4dbfcbb2bd5a1fd1"
+pngquant-bin@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/pngquant-bin/-/pngquant-bin-4.0.0.tgz#468adf7036f50fae09c9c264ef62b6d10c02f5c2"
   dependencies:
-    bin-build "^2.0.0"
+    bin-build "^3.0.0"
     bin-wrapper "^3.0.0"
+    execa "^0.10.0"
     logalot "^2.0.0"
 
 portfinder@^1.0.9:
@@ -5680,6 +6042,10 @@ process-nextick-args@~1.0.6:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"
 
+process-nextick-args@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.0.tgz#a37d732f4271b4ab1ad070d35508e8290788ffaa"
+
 process@^0.11.0:
   version "0.11.10"
   resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
@@ -5713,6 +6079,10 @@ prop-types@^15.6.0:
     loose-envify "^1.3.1"
     object-assign "^4.1.1"
 
+proto-list@~1.2.1:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/proto-list/-/proto-list-1.2.4.tgz#212d5bfe1318306a420f6402b8e26ff39647a849"
+
 proxy-addr@~2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.2.tgz#6571504f47bb988ec8180253f85dd7e14952bdec"
@@ -5940,6 +6310,18 @@ readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable
     string_decoder "~1.0.0"
     util-deprecate "~1.0.1"
 
+readable-stream@^2.3.0:
+  version "2.3.6"
+  resolved "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.3"
+    isarray "~1.0.0"
+    process-nextick-args "~2.0.0"
+    safe-buffer "~5.1.1"
+    string_decoder "~1.1.1"
+    util-deprecate "~1.0.1"
+
 readable-stream@~1.1.9:
   version "1.1.14"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
@@ -6194,7 +6576,7 @@ sane@^2.0.0:
   optionalDependencies:
     fsevents "^1.1.1"
 
-sax@^1.2.1, sax@~1.2.1:
+sax@^1.2.1, sax@~1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
 
@@ -6218,7 +6600,7 @@ schema-utils@^1.0.0:
     ajv-errors "^1.0.0"
     ajv-keywords "^3.1.0"
 
-seek-bzip@^1.0.3:
+seek-bzip@^1.0.3, seek-bzip@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/seek-bzip/-/seek-bzip-1.0.5.tgz#cfe917cb3d274bcffac792758af53173eb1fabdc"
   dependencies:
@@ -6435,6 +6817,18 @@ sockjs@0.3.19:
     faye-websocket "^0.10.0"
     uuid "^3.0.1"
 
+sort-keys-length@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/sort-keys-length/-/sort-keys-length-1.0.1.tgz#9cb6f4f4e9e48155a6aa0671edd336ff1479a188"
+  dependencies:
+    sort-keys "^1.0.0"
+
+sort-keys@^1.0.0:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/sort-keys/-/sort-keys-1.1.2.tgz#441b6d4d346798f1b4e49e8920adfba0e543f9ad"
+  dependencies:
+    is-plain-obj "^1.0.0"
+
 source-list-map@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-2.0.0.tgz#aaa47403f7b245a92fbc97ea08f250d6087ed085"
@@ -6568,6 +6962,10 @@ ssri@^6.0.0:
   dependencies:
     figgy-pudding "^3.5.1"
 
+stable@~0.1.6:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/stable/-/stable-0.1.8.tgz#836eb3c8382fe2936feaf544631017ce7d47a3cf"
+
 stat-mode@^0.2.0:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/stat-mode/-/stat-mode-0.2.2.tgz#e6c80b623123d7d80cf132ce538f346289072502"
@@ -6661,6 +7059,12 @@ string_decoder@~1.0.0, string_decoder@~1.0.3:
   dependencies:
     safe-buffer "~5.1.0"
 
+string_decoder@~1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
+  dependencies:
+    safe-buffer "~5.1.0"
+
 stringstream@~0.0.4:
   version "0.0.5"
   resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"
@@ -6705,6 +7109,12 @@ strip-dirs@^1.0.0:
     minimist "^1.1.0"
     sum-up "^1.0.1"
 
+strip-dirs@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/strip-dirs/-/strip-dirs-2.1.0.tgz#4987736264fc344cf20f6c34aca9d13d1d4ed6c5"
+  dependencies:
+    is-natural-number "^4.0.1"
+
 strip-eof@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
@@ -6765,17 +7175,24 @@ supports-color@^5.3.0, supports-color@^5.4.0:
   dependencies:
     has-flag "^3.0.0"
 
-svgo@^0.7.0:
-  version "0.7.2"
-  resolved "https://registry.yarnpkg.com/svgo/-/svgo-0.7.2.tgz#9f5772413952135c6fefbf40afe6a4faa88b4bb5"
+svgo@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/svgo/-/svgo-1.1.1.tgz#12384b03335bcecd85cfa5f4e3375fed671cb985"
   dependencies:
-    coa "~1.0.1"
+    coa "~2.0.1"
     colors "~1.1.2"
-    csso "~2.3.1"
-    js-yaml "~3.7.0"
+    css-select "^2.0.0"
+    css-select-base-adapter "~0.1.0"
+    css-tree "1.0.0-alpha.28"
+    css-url-regex "^1.1.0"
+    csso "^3.5.0"
+    js-yaml "^3.12.0"
     mkdirp "~0.5.1"
-    sax "~1.2.1"
-    whet.extend "~0.9.9"
+    object.values "^1.0.4"
+    sax "~1.2.4"
+    stable "~0.1.6"
+    unquote "~1.1.1"
+    util.promisify "~1.0.0"
 
 symbol-tree@^3.2.1:
   version "3.2.2"
@@ -6818,6 +7235,18 @@ tar-stream@^1.1.1:
     readable-stream "^2.0.0"
     xtend "^4.0.0"
 
+tar-stream@^1.5.2:
+  version "1.6.2"
+  resolved "https://registry.yarnpkg.com/tar-stream/-/tar-stream-1.6.2.tgz#8ea55dab37972253d9a9af90fdcd559ae435c555"
+  dependencies:
+    bl "^1.0.0"
+    buffer-alloc "^1.2.0"
+    end-of-stream "^1.0.0"
+    fs-constants "^1.0.0"
+    readable-stream "^2.3.0"
+    to-buffer "^1.1.1"
+    xtend "^4.0.0"
+
 tar@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/tar/-/tar-2.2.1.tgz#8e4d2a256c0e2185c6b18ad694aec968b83cb1d1"
@@ -6826,6 +7255,10 @@ tar@^2.2.1:
     fstream "^1.0.2"
     inherits "2"
 
+temp-dir@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/temp-dir/-/temp-dir-1.0.0.tgz#0a7c0ea26d3a39afa7e0ebea9c1fc0bc4daa011d"
+
 tempfile@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/tempfile/-/tempfile-1.1.1.tgz#5bcc4eaecc4ab2c707d8bc11d99ccc9a2cb287f2"
@@ -6833,6 +7266,13 @@ tempfile@^1.0.0:
     os-tmpdir "^1.0.0"
     uuid "^2.0.1"
 
+tempfile@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/tempfile/-/tempfile-2.0.0.tgz#6b0446856a9b1114d1856ffcbe509cccb0977265"
+  dependencies:
+    temp-dir "^1.0.0"
+    uuid "^3.0.1"
+
 test-exclude@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.1.1.tgz#4d84964b0966b0087ecc334a2ce002d3d9341e26"
@@ -6892,6 +7332,10 @@ timed-out@^3.0.0:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/timed-out/-/timed-out-3.1.3.tgz#95860bfcc5c76c277f8f8326fd0f5b2e20eba217"
 
+timed-out@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/timed-out/-/timed-out-4.0.1.tgz#f32eacac5a175bea25d7fab565ab3ed8741ef56f"
+
 timers-browserify@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/timers-browserify/-/timers-browserify-2.0.2.tgz#ab4883cf597dcd50af211349a00fbca56ac86b86"
@@ -6918,6 +7362,10 @@ to-arraybuffer@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/to-arraybuffer/-/to-arraybuffer-1.0.1.tgz#7d229b1fcc637e466ca081180836a7aabff83f43"
 
+to-buffer@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/to-buffer/-/to-buffer-1.1.1.tgz#493bd48f62d7c43fcded313a03dcadb2e1213a80"
+
 to-fast-properties@^1.0.1, to-fast-properties@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
@@ -7063,6 +7511,13 @@ uid-number@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/uid-number/-/uid-number-0.0.6.tgz#0ea10e8035e8eb5b8e4449f06da1c730663baa81"
 
+unbzip2-stream@^1.0.9:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/unbzip2-stream/-/unbzip2-stream-1.3.0.tgz#745ad5745bc4d8f1ac2eb6fc707cfa51d52ab215"
+  dependencies:
+    buffer "^3.0.1"
+    through "^2.3.6"
+
 union-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/union-value/-/union-value-1.0.0.tgz#5c71c34cb5bad5dcebe3ea0cd08207ba5aa1aea4"
@@ -7095,6 +7550,10 @@ unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
 
+unquote@~1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/unquote/-/unquote-1.1.1.tgz#8fded7324ec6e88a0ff8b905e7c098cdc086d544"
+
 unset-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unset-value/-/unset-value-1.0.0.tgz#8376873f7d2335179ffb1e6fc3a8ed0dfc8ab559"
@@ -7142,6 +7601,10 @@ url-regex@^3.0.0:
   dependencies:
     ip-regex "^1.0.1"
 
+url-to-options@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/url-to-options/-/url-to-options-1.0.1.tgz#1505a03a289a48cbd7a434efbaeec5055f5633a9"
+
 url@^0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/url/-/url-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"
@@ -7165,7 +7628,7 @@ util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
 
-util.promisify@^1.0.0:
+util.promisify@^1.0.0, util.promisify@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/util.promisify/-/util.promisify-1.0.0.tgz#440f7165a459c9a16dc145eb8e72f35687097030"
   dependencies:
@@ -7431,10 +7894,6 @@ whatwg-url@^4.3.0:
     tr46 "~0.0.3"
     webidl-conversions "^3.0.0"
 
-whet.extend@~0.9.9:
-  version "0.9.9"
-  resolved "https://registry.yarnpkg.com/whet.extend/-/whet.extend-0.9.9.tgz#f877d5bf648c97e5aa542fadc16d6a259b9c11a1"
-
 which-module@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"
@@ -7619,3 +8078,10 @@ yauzl@^2.2.1:
   dependencies:
     buffer-crc32 "~0.2.3"
     fd-slicer "~1.0.1"
+
+yauzl@^2.4.2:
+  version "2.10.0"
+  resolved "https://registry.yarnpkg.com/yauzl/-/yauzl-2.10.0.tgz#c7eb17c93e112cb1086fa6d8e51fb0667b79a5f9"
+  dependencies:
+    buffer-crc32 "~0.2.3"
+    fd-slicer "~1.1.0"