【报Bug】postcss.config.js 文件报错

按文档 https://uniapp.dcloud.net.cn/tutorial/adapt.html#_3-%E5%86%85%E5%AE%B9%E7%BC%A9%E6%94%BE%E6%8B%89%E4%BC%B8%E7%9A%84%E5%A4%84%E7%90%86

```javascri...