Update dependencies to enable Greenkeeper 🌴 (#2)

* chore(package): update dependencies

* docs(readme): add Greenkeeper badge

Author: greenkeeper[bot]

Diff for: README.md

@@ -1,5 +1,7 @@
 # vue-hackernews-2.0
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/bahmutov/vue-hackernews-2.0.svg)](https://greenkeeper.io/)
+
 HackerNews clone built with Vue 2.0 + vue-router + vuex, with server-side rendering.
 
 <p align="center">

Diff for: package.json

@@ -24,9 +24,9 @@
     "es6-promise": "^4.1.1",
     "express": "^4.16.2",
     "extract-text-webpack-plugin": "^3.0.2",
-    "firebase": "4.6.2",
+    "firebase": "4.10.0",
     "lru-cache": "^4.1.1",
-    "route-cache": "0.4.3",
+    "route-cache": "0.4.4",
     "serve-favicon": "^2.4.5",
     "vue": "^2.5.3",
     "vue-router": "^3.0.1",
@@ -35,14 +35,14 @@
     "vuex-router-sync": "^5.0.0"
   },
   "devDependencies": {
-    "autoprefixer": "^7.1.6",
+    "autoprefixer": "^8.0.0",
     "babel-core": "^6.26.0",
     "babel-loader": "^7.1.2",
     "babel-plugin-syntax-dynamic-import": "^6.18.0",
     "babel-preset-env": "^1.6.1",
-    "chokidar": "^1.7.0",
+    "chokidar": "^2.0.2",
     "css-loader": "^0.28.7",
-    "cypress": "^1.4.1",
+    "cypress": "^2.0.0",
     "cypress-vue-unit-test": "^1.10.0",
     "file-loader": "^1.1.5",
     "friendly-errors-webpack-plugin": "^1.6.1",
@@ -52,11 +52,11 @@
     "stylus-loader": "^3.0.1",
     "sw-precache-webpack-plugin": "^0.11.4",
     "url-loader": "^0.6.2",
-    "vue-loader": "^13.5.0",
-    "vue-style-loader": "^3.0.3",
+    "vue-loader": "^14.1.1",
+    "vue-style-loader": "^4.0.2",
     "vue-template-compiler": "^2.5.3",
     "webpack": "^3.8.1",
-    "webpack-dev-middleware": "^1.12.0",
+    "webpack-dev-middleware": "^2.0.5",
     "webpack-hot-middleware": "^2.20.0",
     "webpack-merge": "^4.1.1",
     "webpack-node-externals": "^1.6.0"