Suppport for python 3.10 alpha 6

[leahein]

It doesn't look like jedi supports the latest features of python 3.10.0a6. Specifically, support for pattern matching syntax.

I understand this is a fairly recent python release, but couldn't seem to find anything in development yet working to support this, so I wanted to raise this as a feature that will need to be supported.

[leahein]

Related to #1732

[davidhalter]

Won't happen for a long time. The blocker is actually davidhalter/parso#138

3.10 might not be supported when it's released. It might take a long time for this to arrive. I currently don't have the motivation to put in a few days of work for a Python feature that I actually dislike. I'm sure it will eventually arrive, but it will take its time.

[Real-Gecko]

davidhalter/parso#138 is almost two years old and Python 3.11 is on the horizon with planned release in October 22. Any progress?