Update test envs now that python 3.12 is released

[rosteen]

Updates our OS tests to all use python 3.12 and adds a test to keep checking against 3.11.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5098f23) 70.73% compared to head (4856f9d) 70.73%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1089   +/-   ##
=======================================
  Coverage   70.73%   70.73%           
=======================================
  Files          64       64           
  Lines        4483     4483           
=======================================
  Hits         3171     3171           
  Misses       1312     1312           

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[pllim]

Hmm, don't you need quotes around python for python>=3.10 ?

python: '3.11'

[rosteen]

Hmm, don't you need quotes around python for python>=3.10 ?

I thought the problem was specific to 3.10, since parsing that as a float would make it 3.1, whereas 3.11 would keep the full value.

[pllim]

oldest deps failure is caused by #1091

devdeps failure is caused by something preventing scipy from upgrading to dev version: numpy==2.0.0.dev0 vs scipy==1.11.3 (while we're at it, looks like matplotlib also failed to upgrade, which is very annoying)

[pllim]

I fixed oldest-deps, so you should rebase if you still want to pursue this.