npm WARN stylus-loader@3.0.2 requires a peer of stylus@>=0.52.4 but none is installed. You must inst

问题：

npm WARN stylus-loader@3.0.2 requires a peer of stylus@>=0.52.4 but none is installed. You must install peer dependencies yourself.

解决办法：

1、在package.json文件中添加如下代码：

    "stylus-loader": "^3.0.2",
    "stylus": "0.52.4",

2、执行npm install 命令即可