Bump django-localflavor from 3.0.1 to 3.1
Bump django-localflavor from 3.0.1 to 3.1

Bumps [django-localflavor](https://github.com/django/django-localflavor) from 3.0.1 to 3.1.
- [Release notes](https://github.com/django/django-localflavor/releases)
- [Changelog](https://github.com/django/django-localflavor/blob/master/docs/changelog.rst)
- [Commits](https://github.com/django/django-localflavor/compare/3.0.1...3.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
DemocracyClub/UK-Polling-Stations,DemocracyClub/UK-Polling-Stations,DemocracyClub/UK-Polling-Stations