upgrade to webpack 2

package.json

@@ -52,7 +52,7 @@
     "babel-preset-es2015": "^6.14.0",
     "http-server": "^0.9.0",
     "standard": "^8.0.0",
-    "webpack": "^1.13.2"
+    "webpack": "^2.1.0-beta.22"
   },
   "standard": {
     "parser": "babel-eslint",

webpack.dev.config.js

@@ -21,7 +21,6 @@ module.exports = {
   plugins: [
     new webpack.DefinePlugin({
       'process.env.NODE_ENV': JSON.stringify('development')
-    }),
-    new webpack.optimize.OccurenceOrderPlugin()
+    })
   ]
 }

webpack.prod.config.js

@@ -24,7 +24,6 @@ module.exports = {
       }
     }),
     new webpack.optimize.DedupePlugin(),
-    new webpack.optimize.OccurenceOrderPlugin(),
     new webpack.optimize.UglifyJsPlugin({
       compress: {
         warnings: false