Bump django from 1.11.22 to 1.11.23

Bumps [django](https://github.com/django/django) from 1.11.22 to 1.11.23.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@1.11.22...1.11.23)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -2,7 +2,7 @@
 Pillow==6.1.0
 lxml==4.4.0
 psycopg2==2.8.3
-Django==1.11.22
+Django==1.11.23
 
 # Other
 amqp==2.5.0