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[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
 requests==2.22.0
 six==1.10.0
-Django==1.11.22
+Django==1.11.23