webpack 打包 UglifyJs 報錯

Vue-cli 打包報錯：
ERROR in static/js/4.784ab4a1238de8e94312.js from UglifyJs
Unexpected token:

原因：Uglify模塊不能壓縮es6的代碼
解決：修改webpack.base.conf.js 轉換出錯文件

　　　　{
        test: /\.js$/,
        loader: 'babel-loader',
        include: [resolve('src'), resolve('test'),resolve('node_modules/browser-md5-file/dist')]
      }