feat(index): add 'exclude' option

merge pull request #1 from JoschaMetze/master

Author: JoschaMetze

src/index.ts

@@ -8,7 +8,7 @@ import * as webpack from 'webpack'
  *
  * See: https://webpack.github.io/docs/list-of-plugins.html#uglifyjsplugin
  */
-export = function uglify({debug = false} = {}) {
+export = function uglify({debug = false, exclude = []} = {}) {
   return function uglify(this: WebpackConfig): WebpackConfig {
     const options = debug ? {
       beautify: true, //debug
@@ -32,6 +32,8 @@ export = function uglify({debug = false} = {}) {
         keep_fnames: true
       }, //prod
 
+      exclude: exclude,
+
       compress: {
         screw_ie8: true,
         warnings: false