CI fixes

[Carifio24]

This PR fixes two issues with the CI:

• Use dev version of glue-qt for devdeps (to avoid issues like e.g. Latest repository release doesn't show up on PyPI glue-qt#23)
• astropy has dropped support for Python 3.10 so we can no longer use that Python version for devdeps

These two commits were originally on #103 but they're also needed for e.g. #115 so I decided to make this a separate PR while I work out any other CI issues with #103.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.21%. Comparing base (f6f0135) to head (bbd8bf5).
Report is 9 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #116   +/-   ##
=======================================
  Coverage   71.21%   71.21%           
=======================================
  Files          18       18           
  Lines        1063     1063           
=======================================
  Hits          757      757           
  Misses        306      306           

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[dhomeier]

Looks good; one might just think about adding a replacement devdeps job, but that could as well wait until we add py313.

[Carifio24]

I had thought about replacing with another devdeps job, but agreed that we can do that once we add Python 3.13 tests.