Bump freezegun from 0.3.14 to 0.3.15
Bump freezegun from 0.3.14 to 0.3.15

Bumps [freezegun](https://github.com/spulec/freezegun) from 0.3.14 to 0.3.15.
- [Release notes](https://github.com/spulec/freezegun/releases)
- [Changelog](https://github.com/spulec/freezegun/blob/master/CHANGELOG)
- [Commits](https://github.com/spulec/freezegun/compare/0.3.14...0.3.15)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
adamtheturtle/vws-python,adamtheturtle/vws-python