message: fix(timepicker): fixed reset validation for ngModel
diff: @@ -328,6 +328,7 @@ export class TimepickerComponent
  */
  writeValue(obj?: string | Date): void {
  if (isValidDate(obj)) {
  + this.resetValidation();
  this._store.dispatch(this._timepickerActions.writeValue(parseTime(obj)));
  } else if (obj == null) {
  this._store.dispatch(this._timepickerActions.writeValue());
  