Add minify to SWPrecacheWebpackPlugin config

Author: goldhand

Diff for: packages/react-scripts/config/webpack.config.prod.js

@@ -15,10 +15,10 @@ var HtmlWebpackPlugin = require('html-webpack-plugin');
 var ExtractTextPlugin = require('extract-text-webpack-plugin');
 var ManifestPlugin = require('webpack-manifest-plugin');
 var InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
+var SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
 var url = require('url');
 var paths = require('./paths');
 var getClientEnvironment = require('./env');
-var SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
 
 // @remove-on-eject-begin
 // `path` is not used after eject - see https://github.com/facebookincubator/create-react-app/issues/1174
@@ -278,6 +278,7 @@ module.exports = {
     new SWPrecacheWebpackPlugin({
       dontCacheBustUrlsMatching: /\.\w{8}\./,
       filename: 'service-worker.js',
+      minify: true,
       navigateFallback: publicUrl + '/index.html',
       staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/]
     })