Mangling is the default

Thanks @mewtaylor. Not sure what changed. When I double checked this, the common bundle was the same size with or without the option.  Weirdly it also mysteriously changed its size from the last time I checked to 1.23MB. ¯\_(ツ)_/¯

webpack.config.js

@@ -105,7 +105,6 @@ module.exports = {
             {from: 'intl', to: 'js'}
         ]),
         new webpack.optimize.UglifyJsPlugin({
-            mangle: true,
             compress: {
                 warnings: false
             }