Bump django from 1.11.13 to 1.11.23

Bumps [django](https://github.com/django/django) from 1.11.13 to 1.11.23.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@1.11.13...1.11.23)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -19,7 +19,7 @@ cyordereddict==1.0.0
 Cython==0.28.3
 decorator==4.3.0
 dill==0.2.5
-Django==1.11.13
+Django==1.11.23
 django-crispy-forms==1.7.2
 django-filter==1.1.0
 django-formtools==2.1