Update django-redis to 4.7.0

[safety-cli]

There's a new version of django-redis available.
You are currently using 4.4.4. I have updated it to 4.7.0

These links might come in handy: PyPI | Changelog | Repo

Changelog

4.7.0

---

Date: 2017-01-02

• Add the ability to enable write to slave when master is not available.
• Add itersize parameter to delete_pattern.

4.6.0

---

Date: 2016-11-02

• Fix incorrect behavior of clear() method.

4.5.0

---

Date: 2016-09-21

• Now only support Django 1.8 and above. Support for older versions has been dropped.
• Remove undocumented and deprecated support for old connection string format.
• Add support for PASSWORD option (usefull when the password contains url unsafe
  characters).
• Make the package compatible with fake redis.
• Fix compatibility issues with latest django version (1.10).

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖