The package-lock.json file was created with an old version of npm

问题背景：
npm install 报：
The package-lock.json file was created with an old version of npm

问题分析：
你使用npm太新了

#npm i npm@6 -g
#npm -v
6.14.15

• 参考文章：https://blog.csdn.net/inthat/article/details/120564807