Bump django from 1.10.3 to 2.2.24

Bumps [django](https://github.com/django/django) from 1.10.3 to 2.2.24.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@1.10.3...2.2.24)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
...

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

requirements.txt

@@ -1,5 +1,5 @@
 coverage==4.0.3
-Django==1.10.3
+Django==2.2.24
 django-appconf==1.0.2
 django-extensions==1.7.4
 flake8==3.2.1