NormalModuleReplacementPlugin

Hi!

I can't figure out how to use a plugin in my gulpfile. As described in ElementUI, I need to add the following plugin:

`new webpack.NormalModuleReplacementPlugin(/element-ui[\/\\]lib[\/\\]locale[\/\\]lang[\/\\]zh-CN/, 'element-ui/lib/locale/lang/en')`

Any pointers?

Thanks