Add import CustomJSONFieldSerializerExtension in __init__.py

Author: AlexPetul

django_custom_jsonfield/rest_framework/__init__.py

@@ -0,0 +1 @@
+from .openapi import CustomJSONFieldSerializerExtension

django_custom_jsonfield/rest_framework/openapi.py

@@ -9,7 +9,7 @@
 
 
 class CustomJSONFieldSerializerExtension(OpenApiSerializerFieldExtension):
-    target_class = "django_custom_jsonfield.serializers.CustomJSONField"
+    target_class = "django_custom_jsonfield.rest_framework.serializers.CustomJSONField"
 
     def map_serializer_field(self, auto_schema, direction):
         schema = self.target.schema