Bump djangorestframework from 3.9.3 to 3.9.4
Bump djangorestframework from 3.9.3 to 3.9.4

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.9.3 to 3.9.4.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](https://github.com/encode/django-rest-framework/compare/3.9.3...3.9.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
rloomans/measure-mate,rloomans/measure-mate,rloomans/measure-mate,rloomans/measure-mate