npm装包太慢了，那就用yarn把
首先全局安装
$ npm i yarn -g
yarn和npm命令对比
| npm | yarn |
|---|---|
| npm install | yarn install |
| npm install react --save | yarn add react |
| npm uninstall react --save | yarn remove react |
| npm install react --save-dev | yarn add react --dev |
| npm update --save | yarn upgrade |
| npm run dev | yarn run dev |
