Support redis-py 4.0

[terencehonles]

Problem Statement

The Redis Python client is now in RC1 but introduces some breaking changes (specifically seen with the Sentinel configuration). This library should be updated to support the new changes ideally in a backwards compatiable manner.

[WisdomPill]

there is already an issue for this, it is #542

[terencehonles]

Well I think they're related, but is this the only thing that's broken in redis 4?

[hartwork]

CC #575 #576

[aleehedl]

Is there any estimate when this will be available in a release?

[WisdomPill]

I can release in the next days, max Monday.

Can I ask why you are looking for redis-py 4 as a dependency?

[WisdomPill]

I would wait for #580 to be merged and then release

[aleehedl]

Can I ask why you are looking for redis-py 4 as a dependency?

Yeah, because redis-py 4 was already installed into a production system and I'm not sure how a downgrade would pan out.

[WisdomPill]

I can say that the only known issue is with sentinel commands that are different in 4.0.1 and 4.0.2,
the rest of the versions are supported,
I am waiting for @terencehonles to review #580 to support django 4 and drop support for django 2.2.

After that we can for sure release

[WisdomPill]

Will release tomorrow