Test fix

Author: ray2c

lib/services/notes/notes_service.dart

@@ -108,9 +108,9 @@ class NotesService {
 
   /// Returns all the notes with the [ids].
   Future<List<Note>> getAllByIds(List<int> ids) async => [
-        ...(await (_plainTextNotes.getAll(ids))).nonNulls,
-        ...(await (_richTextNotes.getAll(ids))).nonNulls,
-        ...(await (_checklistNotes.getAll(ids))).nonNulls,
+        ...?await (_plainTextNotes.getAll(ids)),
+        ...?await (_richTextNotes.getAll(ids)),
+        ...?await (_checklistNotes.getAll(ids)),
       ];
 
   /// Returns all the notes that are not deleted.