Call APIView get_ methods instead of direct attribute access

queryset -> get_queryset
renderer_classes -> get_renderers
parser_classes -> get_parsers

docs/conf.py

@@ -183,6 +183,7 @@ nitpick_ignore = [
     ('py:class', 'ruamel.yaml.dumper.SafeDumper'),
     ('py:class', 'rest_framework.serializers.Serializer'),
     ('py:class', 'rest_framework.renderers.BaseRenderer'),
+    ('py:class', 'rest_framework.parsers.BaseParser'),
     ('py:class', 'rest_framework.schemas.generators.EndpointEnumerator'),
     ('py:class', 'rest_framework.views.APIView'),