Update freezegun requirement from <0.4,>=0.3 to >=0.3,<1.1
Update freezegun requirement from <0.4,>=0.3 to >=0.3,<1.1

Updates the requirements on [freezegun](https://github.com/spulec/freezegun) to permit the latest version.
- [Release notes](https://github.com/spulec/freezegun/releases)
- [Changelog](https://github.com/spulec/freezegun/blob/master/CHANGELOG)
- [Commits](https://github.com/spulec/freezegun/compare/0.3.0...1.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
django-oscar/django-oscar-accounts,django-oscar/django-oscar-accounts