npm install安装插件

cmd命令窗口，执行npm install
报错
npm WARN [email protected] requires a peer of ajv@^6.9.1 but none is installed. You must install peer dependencies yourself.
npm WARN [email protected] requires a peer of webpack@^3.1.0 but none is installed. You must install peer dependencies yourself.

解决方法：
批量安装不行，就一个一个地安装。
npm install ajv@^6.9.1
npm install webpack@^4.4.0