Merge pull request #277 from lowitea/patch-1

Remove deprecation warning

Author: asherf

django_prometheus/__init__.py

@@ -6,6 +6,7 @@
 # Import all files that define metrics. This has the effect that
 # `import django_prometheus` will always instantiate all metric
 # objects right away.
+import django
 from django_prometheus import middleware, models
 
 __all__ = ["middleware", "models", "pip_prometheus"]
@@ -19,4 +20,5 @@
     # If people don't have pip, don't export anything.
     pass
 
-default_app_config = "django_prometheus.apps.DjangoPrometheusConfig"
+if django.VERSION < (3, 2):
+    default_app_config = "django_prometheus.apps.DjangoPrometheusConfig"