Bump django from 2.0.7 to 2.2.24

Bumps [django](https://github.com/django/django) from 2.0.7 to 2.2.24.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/2.0.7...2.2.24)

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

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

requirements.txt

@@ -6,7 +6,7 @@ cloudpickle==0.6.1
 cycler==0.10.0
 dask==0.20.0
 decorator==4.3.0
-Django==2.0.7
+Django==2.2.24
 django-rest-framework==0.1.0
 djangorestframework==3.8.2
 gast==0.2.0