Hello!

• Please add compression styles and use plug-ins only on production

var postcssOptions = production? {    plugins: [      require ( 'postcss-will-change'), // fallback will-change      require ( 'autoprefixer') (Object.assign ({        browsers: [ 'ie> 8', 'last 5 versions']      }, Options.autoprefixer)),      require ( 'postcss-csso'),      require ( 'postcss-flexbugs-fixes')    ] } {}

• Please update depending :)

• Webpack 2 can es2015 import, may be necessary to specify in .babelrc: [ "es2015", { "modules": false}] a babel advises himself to a preset page?

• It is possible as well to add a couple of rules to compress js:
  new webpack.optimize.UglifyJsPlugin ({
         minimize: true,
         beautify: false,
  })

Thank you! :)