Eslint

TypeError: this.cliEngineCtor is not a constructor，webstorm和eslint的版本纠结

webStorm 2020.3 
npm install eslint@7.0.0 --save-exact

https://www.cnblogs.com/Neeo/articles/16945575.html
https://blog.csdn.net/liming1016/article/details/124544409

Environment key "es2021" is unknown

原因：版本过低，es2021在eslint v7.8.0才被添加
https://github.com/eslint/eslint/releases/tag/v7.8.0

https://www.jianshu.com/p/9e96a00ff438