upgrade ng 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 cli

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

Example 3: update angular cli

For updating angular cli type this command :
ng update @angular/cli @angular/core

Example 4: update angular to specific version

ng update @angular/cli@8.1.1 @angular/core@8.1.1