angular auto code update from 4 to 9 code example
Example 1: update angular cli 10
content_copy
ng update @angular/cli @angular/core
Example 2: update angular to specific version
ng update @angular/cli@8.1.1 @angular/core@8.1.1
content_copy
ng update @angular/cli @angular/core
ng update @angular/cli@8.1.1 @angular/core@8.1.1