Bump django from 2.1.7 to 2.2.10

Bumps [django](https://github.com/django/django) from 2.1.7 to 2.2.10.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.1.7...2.2.10)

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 djangorestframework==3.9.2
-Django==2.1.7
+Django==2.2.10
 Pygments==2.3.1
 Markdown==3.1
 coreapi==2.3.3