安装babel-preset-env出现的问题

npm ERR! code EINTEGRITY
npm ERR! sha1-OGchPo3Xm/Ho8jAMDPwe+xgsDfE= integrity checksum failed when using sha1: wanted sha1-OGchPo3Xm/Ho8jAMDPwe+xgsDfE= but got sha1-gNVXCrjQagTW0VaF+kYHiU1O0Iw=. (33078 bytes)
之前babel-preset-env安装失败；
试了两种办法：

清除缓存：

npm cache verify

降低npm缓存

npm -g install npm@4