code: function build_dist_min(){
    // run webpack
    return gulp.src('index.js').pipe(webpackStream(createWebpackConfig({
      mode: 'production',
      entry: classicEntry,
      output: {
          filename:'oidc-client.min.js',
          libraryTarget:'var',
          library:'Oidc'
      },
      plugins: [],
      devtool: false,
      optimization: {
        minimizer: [
          new UglifyJsPlugin({
            uglifyOptions: {
              keep_fnames: true
            }
          })
        ]
      }
    }), webpack))
    .pipe(gulp.dest('dist/'));
  }
docs: classic build without sourcemaps & minified