Redis requirement ranges

[sondrelg]

Hi @tobymao, sorry for the issue spam.

Would you mind unpinning the redis requirement upper-bound? I see the original issue is resolved, and I need to be able to run 4.4+ to fix another ]issue I'm having, migrating from a standalone to cluster redis setup 🙇

Specifically this line: https://github.com/tobymao/saq/blob/master/setup.py#L32

[tobymao]

do you know how to do version bounds?