npm升级

安装node-modules: cnpm I
运行vue-cli程序：npm start || npm run dev

npm install -g npm //npm -g install [email protected]

参考https://www.cnblogs.com/chaoyangya/p/10484513.html
err参考https://www.cnblogs.com/thinkingthigh/p/7657198.html
windows下切换node版本参考https://www.cnblogs.com/zjknb/p/11715007.html
https://segmentfault.com/q/1010000012904361
https://www.cnblogs.com/ssszjh/p/10184119.html
https://blog.csdn.net/zhan_lijian/article/details/85165930