Bump djangorestframework from 3.11.1 to 3.12.1
Bump djangorestframework from 3.11.1 to 3.12.1

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.11.1 to 3.12.1.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](https://github.com/encode/django-rest-framework/compare/3.11.1...3.12.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
pydata/conf_site,pydata/conf_site,pydata/conf_site