要更新Angular Cli global-

npm uninstall -g angular-cli
npm cache clean 
npm install -g @angular/cli@latest

更新Angular Cli dev-

npm uninstall --save-dev angular-cli
npm install --save-dev @angular/cli@latest
npm install

在npm安装后修复审计问题:

npm audit fix

解决与“angular.json”相关的问题:

ng update @angular/cli --migrate-only --from=1.7.4