message: feat: expose DropdownPosition type
diff: * Public API Surface of ng-select
  */
  -export { NgSelectComponent, SELECTION_MODEL_FACTORY } from './lib/ng-select.component';
  +export { DropdownPosition, NgSelectComponent, SELECTION_MODEL_FACTORY } from './lib/ng-select.component';
  export { NgSelectModule } from './lib/ng-select.module';
  export { NgOption } from './lib/ng-select.types';
  export { SelectionModel } from './lib/selection-model';
  