Add python 3.10 to test suite for github actions

[JBGreisman]

Looking ahead, it makes sense to include this in our test suite to preemptively catch any issues

[JBGreisman]

Blocked by numpy/numpy#20039 for now.

[JBGreisman]

This PR now seems good to go to me. The only problem is that pytorch, which is a requirement in our [dev] build does not support python3.10 yet. As such, a call to pip install -e .[dev] would currently fail if called using python3.10.

I'm not sure if the above failure mode should keep us from updating to support python 3.10 though.

[kmdalton]

I don't have any serious issues with this PR. I don't think it is very likely the dev build issue will affect users. If it does, hopefully they'll submit an issue.

However, I do wonder whether you can replace python -m pip .... with pip ... in these yaml files. I'm guessing they are written this way for a reason, but if we could pip ... it'd be slightly cleaner.

[codecov-commenter]

Codecov Report

Merging #101 (eb41bc8) into main (1c180ae) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #101   +/-   ##
=======================================
  Coverage   98.72%   98.72%           
=======================================
  Files          41       41           
  Lines        1571     1571           
=======================================
  Hits         1551     1551           
  Misses         20       20           

Flag	Coverage Δ
unittests	98.72% <ø> (ø)

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