Bundles Optimization

// ------------------------------------
// BUNDLES OPTIMIZATION
// ------------------------------------
const optimization = {
  optimization: {
    splitChunks: {
      chunks: 'all',
      minChunks: 2
    },
    minimizer: [
      new UglifyJsPlugin({
        uglifyOptions: {
          compress: {
            unused: true,
            dead_code: true,
            warnings: false
          }
        },
        sourceMap: true
      }),
      new OptimizeCSSAssetsPlugin({})
    ]
  },
  performance: {
    hints: false
  }
};