Contributing communication channels are not available

[tvd0x2a]

I reviewed https://redislite.readthedocs.io/en/latest/topic/contributing.html and was hoping to ask a question about the CLA (#156) via email or IRC.

The pythonredislite-subscribe@yahoogroups.com email fails, because yahoogroups.com does not have MX dns records. Yahoo Groups seems to be shutdown: https://en.wikipedia.org/wiki/Yahoo!_Groups . I also was not able to access the web portal.

The Freenode IRC also seems to be down (I couldn't tell if this was a Freenode general issue or the specific channel was missing).

What's the current recommended way to communicate with the redislite community? I'm happy to submit a PR to update the docs.

Thanks in advance!