upgrade Anulag CLI code example
Example 1: ng update @angular/core @angular/cli
npm uninstall -g angular-cli
npm install -g @angular/cli@latest
Example 2: update angular to specific version
ng update @angular/cli@8.1.1 @angular/core@8.1.1
npm uninstall -g angular-cli
npm install -g @angular/cli@latest
ng update @angular/cli@8.1.1 @angular/core@8.1.1