extract-text-webpack-plugin配置问题：Tapable.plugin is deprecated. Use new API on `.hooks`instead

在webpack4中配置extract-text-webpack-plugin时，npm run build后报错

DeprecationWarning: Tapable.plugin is deprecated. Use new API on `.hooks` instead

查找了下原因，是当前的extract-text-webpack-plugin版本不支持webpack4，更新到最新版本

npm install extract-text-webpack-plugin@next

则编译无错

对应的extract-text-webpack-plugin版本是：