feat(@angular-devkit/build-angular): update webpack dependencies

Author: clydin

packages/angular_devkit/build_angular/package.json

@@ -14,45 +14,45 @@
     "ajv": "~6.4.0",
     "autoprefixer": "^8.4.1",
     "circular-dependency-plugin": "^5.0.2",
-    "clean-css": "^4.1.11",
+    "clean-css": "^4.2.1",
     "copy-webpack-plugin": "^4.5.2",
-    "file-loader": "^1.1.11",
+    "file-loader": "^2.0.0",
     "glob": "^7.0.3",
     "html-webpack-plugin": "^3.0.6",
     "istanbul": "^0.4.5",
     "istanbul-instrumenter-loader": "^3.0.1",
     "karma-source-map-support": "^1.2.0",
     "less": "^3.7.1",
     "less-loader": "^4.1.0",
-    "license-webpack-plugin": "^1.3.1",
+    "license-webpack-plugin": "^1.4.0",
     "loader-utils": "^1.1.0",
-    "mini-css-extract-plugin": "~0.4.0",
+    "mini-css-extract-plugin": "^0.4.2",
     "minimatch": "^3.0.4",
     "parse5": "^4.0.0",
     "opn": "^5.1.0",
     "portfinder": "^1.0.13",
     "postcss": "^6.0.22",
     "postcss-import": "^11.1.0",
-    "postcss-loader": "^2.1.5",
+    "postcss-loader": "^2.1.6",
     "postcss-url": "^7.3.2",
     "raw-loader": "^0.5.1",
     "rxjs": "~6.2.0",
     "sass-loader": "^7.1.0",
     "semver": "^5.5.0",
     "source-map-support": "^0.5.0",
-    "source-map-loader": "^0.2.3",
+    "source-map-loader": "^0.2.4",
     "stats-webpack-plugin": "^0.6.2",
-    "style-loader": "^0.21.0",
+    "style-loader": "^0.23.0",
     "stylus": "^0.54.5",
     "stylus-loader": "^3.0.2",
     "tree-kill": "^1.2.0",
     "terser-webpack-plugin": "^1.0.2",
-    "url-loader": "^1.0.1",
-    "webpack": "^4.15.1",
-    "webpack-dev-middleware": "^3.1.3",
-    "webpack-dev-server": "^3.1.4",
-    "webpack-merge": "^4.1.2",
-    "webpack-sources": "^1.1.0",
+    "url-loader": "^1.1.1",
+    "webpack": "^4.17.1",
+    "webpack-dev-middleware": "^3.2.0",
+    "webpack-dev-server": "^3.1.7",
+    "webpack-merge": "^4.1.4",
+    "webpack-sources": "^1.2.0",
     "webpack-subresource-integrity": "^1.1.0-rc.4"
   },
   "optionalDependencies": {