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] <support@github.com>

requirements.txt

@@ -1,4 +1,4 @@
-django==1.11.22
+django==1.11.23
 appdirs==1.4.0
 argparse==1.2.1
 decorator==3.4.0