Bump django from 2.0.13 to 2.2.24

Bumps [django](https://github.com/django/django) from 2.0.13 to 2.2.24.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.0.13...2.2.24)

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

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

requirements.txt

@@ -2,7 +2,7 @@ certifi==2018.1.18
 chardet==3.0.4
 click==6.7
 dj-database-url==0.4.2
-Django==2.0.13
+Django==2.2.24
 idna==2.6
 mod-wsgi==4.6.6
 Pillow==5.0.0