Enable Python 3.10 in CI

[joshuap]

I forget why this was failing.

Edit: oh right, it's because of #104

[dotysan]

I got it working (sorta) over here. https://github.com/dotysan/honeybadger-python/actions/runs/5166178976

Just had to blank out a few suspect tests. Hopefully someone with better understanding of mock can resurrect them.

And Python 3.11 works too, FTW!

[dotysan]

I had to temporarily disable some suspect tests that use mock. But got it to build here. #153