refactor(neon,neon_news,neon_notes): make InteractiveBloc.refresh FutureOr

Signed-off-by: Nikolas Rimikis <leptopoda@users.noreply.github.com>

packages/neon/neon/lib/src/bloc/bloc.dart

@@ -19,7 +19,7 @@ abstract class InteractiveBloc extends Bloc {
   final _errorsStreamController = StreamController<Object>();
   late Stream<Object> errors = _errorsStreamController.stream.asBroadcastStream();
 
-  Future<void> refresh();
+  FutureOr<void> refresh();
 
   void addError(final Object error) {
     _errorsStreamController.add(error);

packages/neon/neon_news/lib/blocs/article.dart

@@ -44,7 +44,7 @@ class NewsArticleBloc extends InteractiveBloc implements NewsArticleBlocEvents,
   BehaviorSubject<bool> unread = BehaviorSubject<bool>();
 
   @override
-  Future<void> refresh() async {}
+  void refresh() {}
 
   @override
   void markArticleAsRead() {

packages/neon/neon_notes/lib/blocs/note.dart

@@ -62,7 +62,7 @@ class NotesNoteBloc extends InteractiveBloc implements NotesNoteBlocEvents, Note
   BehaviorSubject<String> category = BehaviorSubject<String>();
 
   @override
-  Future<void> refresh() async {}
+  void refresh() {}
 
   @override
   void updateCategory(final String category) {