message: docs(CHANGELOG): add note about Angular 4 support
diff: <a name="4.4.1"></a>
  # [4.4.1](https://github.com/NativeScript/nativescript-angular/compare/4.4.0...4.4.1) (2017-10-13)
  -
  +> This is the last version of NativeScript Angular that supports Angular 4.
  ### Bug Fixes
  