最佳答案
Recently I started Angular 2 tutorial at https://angular.io/docs/ts/latest/tutorial/.
and left off with Angular 2 beta 8. Now I resumed the tutorial and latest beta is beta 14.
If I simply do npm update a few modules (preloaded with the tutorial) are updated but not Angular2 (I can see that with npm ls).
If I do npm update angular 2 or npm update angular2@2.0.0beta.14 it just does nothing either.