title: number input always trigger change event
body: <p>I have a issue with Angulars change event on numeric input. It doesn't always trigger when i click the increment or decrament buttons, actualy it triggers once then it will trigger only after input losses hover.</p>
  
  <p>My question is if there is some way to prevent this from happening or some replacement for change event.</p>
  
  <p>some ground for testing:
  <a href="https://stackblitz.com/edit/angular-2xj1a7" rel="nofollow noreferrer">stackblitz</a></p>