Merge pull request #51 from talkpython/dependabot/pip/days/053-056-django-registration/demo/django-2.2.21

Bump django from 2.2.20 to 2.2.21 in /days/053-056-django-registration/demo

Author: mikeckennedy

days/053-056-django-registration/demo/requirements.txt

@@ -1,2 +1,2 @@
-django==2.2.20
+django==2.2.21
 django-registration==3.1.2