Bump django-cors-headers from 3.6.0 to 3.7.0
Bump django-cors-headers from 3.6.0 to 3.7.0

Bumps [django-cors-headers](https://github.com/adamchainz/django-cors-headers) from 3.6.0 to 3.7.0.
- [Release notes](https://github.com/adamchainz/django-cors-headers/releases)
- [Changelog](https://github.com/adamchainz/django-cors-headers/blob/master/HISTORY.rst)
- [Commits](https://github.com/adamchainz/django-cors-headers/compare/3.6.0...3.7.0)

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