任何人都能指导我这个错误吗？当我运行npm i时，bower要求我提供工作空间的角度版本，但我一直在安装所需的特定版本（1.5.8），非常感谢任何帮助！
> workspace@1.0.0 postinstall C:\dev\site
> bower install && ./node_modules/.bin/gulp
'.' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! workspace@1.0.0 postinstall: `bower install && ./node_modules/.bin/gulp`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the workspace@1.0.0 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.