Bump djangorestframework from 3.12.4 to 3.13.1
Bump djangorestframework from 3.12.4 to 3.13.1

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.12.4 to 3.13.1.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](https://github.com/encode/django-rest-framework/compare/3.12.4...3.13.1)

---
updated-dependencies:
- dependency-name: djangorestframework
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
WikipediaLibrary/TWLight,WikipediaLibrary/TWLight,WikipediaLibrary/TWLight,WikipediaLibrary/TWLight,WikipediaLibrary/TWLight