Bump django from 3.1.2 to 3.1.3
Bump django from 3.1.2 to 3.1.3

Bumps [django](https://github.com/django/django) from 3.1.2 to 3.1.3.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/3.1.2...3.1.3)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
staticdev/django-sorting-bootstrap,staticdev/django-sorting-bootstrap