在jenkins构建中出现这个问题，但是本地运行正常
You seem to not be depending on “@angular/core”. This is an error
把node_modules删除，再重新安装
rimraf node_modules cnpm install
参考： https://stackoverflow.com/questions/41534459/you-seem-to-not-be-depending-on-angular-core-this-is-an-error
