message: fix: emit add event after model has been updated
  closes
diff: @@ -431,10 +431,10 @@ export class NgSelectComponent implements OnDestroy, OnChanges, AfterViewInit, C
  this._clearSearch();
  }
  + this._updateNgModel();
  if (this.multiple) {
  this.addEvent.emit(item.value);
  }
  - this._updateNgModel();
  }
  if (this.closeOnSelect || this.itemsList.noItemsToSelect) {
  