Bugfix for old django, expecting manager to be instance of models.Manager

src/django_clickhouse/models.py

@@ -7,18 +7,17 @@ from typing import Optional, Any, Type, Set
 
 import six
 from django.db import transaction
-from django.db.models.manager import BaseManager
 from django.db.models import Manager
+from django.db.models import QuerySet as DjangoQuerySet, Model as DjangoModel
+from django.db.models.manager import BaseManager
 from django.db.models.signals import post_save, post_delete
 from django.dispatch import receiver
-from django.db.models import QuerySet as DjangoQuerySet, Model as DjangoModel
 from statsd.defaults.django import statsd
 
 from .configuration import config
 from .storages import Storage
 from .utils import lazy_class_import
 
-
 try:
     from django_pg_returning.manager import UpdateReturningMixin
 except ImportError: