Bump redis from 3.3.4 to 3.3.6
Bump redis from 3.3.4 to 3.3.6

Bumps [redis](https://github.com/andymccurdy/redis-py) from 3.3.4 to 3.3.6.
- [Release notes](https://github.com/andymccurdy/redis-py/releases)
- [Changelog](https://github.com/andymccurdy/redis-py/blob/master/CHANGES)
- [Commits](https://github.com/andymccurdy/redis-py/compare/3.3.4...3.3.6)

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