Merge branch 'add-count' into 'main'

set default to None

See merge request hub/django-autocomplete-multi-models!2

autocomplete_multi_models/models.py

@@ -15,6 +15,7 @@ class IndexedWord(django.db.models.Model):
     occurrence = django.db.models.IntegerField(
         null=True,
         blank=True,
+        default=None,
     )
 
     def __str__(self):