Merge pull request #196 from graphql-python/dependabot/pip/examples/django_mongoengine/django-2.2.28

Bump django from 2.2.24 to 2.2.28 in /examples/django_mongoengine

Author: blochsbek

examples/django_mongoengine/requirements.txt

@@ -1,4 +1,4 @@
-Django==2.2.24
+Django==2.2.28
 pytest==4.6.3
 pytest-django==3.5.1
 mongoengine==0.17.0