Fix travis

Author: Tim Csitkovics

example/tests/test_serializers.py

@@ -5,10 +5,11 @@
 from django.urls import reverse
 from django.utils import timezone
 
-from example.models import Author, Blog, Entry
 from rest_framework_json_api.serializers import ResourceIdentifierObjectSerializer, ModelSerializer
 from rest_framework_json_api.utils import format_resource_type
 
+from example.models import Author, Blog, Entry
+
 pytestmark = pytest.mark.django_db