Add a count parameter to lpop/rpop for redis >= 6.2.0

[wavenator]

Pull Request check-list

Please make sure to review and check all of these items:

• Does $ tox pass with this change (including linting)?
• Does travis tests pass with this change (enable it first in your forked repo and wait for the travis build to finish)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?

NOTE: these things are not required to open a PR and can be done
afterwards / while the PR is open.

Description of change

Please provide a description of the change here.

[chayim]

@wavenator Mind updating your branch with the latest master. CI has moved to GitHub actions, and the unit test were fixed. Happy to review when ready.

[wavenator]

@chayim Thanks for your reply. My tests have been fixed. One more test failed that wasn't mine. I appreciate your help with this. By the way, I hope you squash all my commits.

[chayim]

@wavenator Looks great, and checks out against the lpop and rpop docs. I think the unit test failed because the client kill run (my change a while back!) didn't properly turf all connections. I'm going to play with this a bit more, to be sure - and re-run the action accordingly.

[wavenator]

@wavenator Looks great, and checks out against the lpop and rpop docs. I think the unit test failed because the client kill run (my change a while back!) didn't properly turf all connections. I'm going to play with this a bit more, to be sure - and re-run the action accordingly.

I will be more than happy to help you if you need it!

[chayim]

@wavenator I have a PR up, purely to update to the latest redis-docker (and fix client kill), which will hence pass yours. But, I uncovered a flaky test (this same one!) as my reminder. I've asked @AvitalFineRedis to fix the flaky test from her PR, so that I don't blindly merge my change.

redis-py had a period of time where unit tests in master were failing, so my goal is to keep those, always passing - as first order.

[chayim]

Validated with latest master, tests pass.

@wavenator Thanks a tonne for your contribution, and patience in the back-and-forth. Much obliged!