Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.8 to 3.11.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](https://github.com/encode/django-rest-framework/compare/3.8.0...3.11.2

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