Compress more aggressively (thanks @jdalton)

Author: gaearon

webpack.config.js

@@ -25,9 +25,12 @@ if (env === 'production') {
   config.plugins.push(
     new webpack.optimize.UglifyJsPlugin({
       compressor: {
+        pure_getters: true,
+        unsafe: true,
+        unsafe_comps: true,
         screw_ie8: true,
         warnings: false
-      }
+       }
     })
   )
 }