Merge pull request #474 from syphar/silence-django-check

set default_auto_field to silence django 3.2 warnings

django_summernote/apps.py

@@ -8,6 +8,7 @@
 class DjangoSummernoteConfig(AppConfig):
     name = 'django_summernote'
     verbose_name = 'Django Summernote'
+    default_auto_field = 'django.db.models.AutoField'
 
     theme = 'bs3'
     config = {}