问题：

npm ERR! code CERT_HAS_EXPIRED
npm ERR! errno CERT_HAS_EXPIRED
npm ERR! request to https://registry.npm.taobao.org/yorkie/download/yorkie-2.0.0.tgz failed, reason: certificate has expired

解决：

清除npm缓存
npm cache clean --force
取消ssl验证：
npm config set strict-ssl false
之后再npm install