Install dev wheels properly

[pllim]

You can simplify devdeps calls and you can also install astropy dev from wheel.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4d44cd8) 84.31% compared to head (99afc5f) 84.31%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #222   +/-   ##
=======================================
  Coverage   84.31%   84.31%           
=======================================
  Files          35       35           
  Lines        6452     6452           
=======================================
  Hits         5440     5440           
  Misses       1012     1012           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[zacharyburnett]

this looks good to me, for what it's worth

[pllim]

I added a commit due to:

• For downstream maintainers: astropy-dev + numpy-dev now also needs pyerfa-dev astropy/astropy#15638

[pllim]

But do you actually use devdeps? I don't see it in the jobs here.

[zacharyburnett]

But do you actually use devdeps? I don't see it in the jobs here.

#213 adds devdeps as an optional workflow when adding the run devdeps tests label, but it isn't merged yet

[pllim]

OK, then maybe you can merge this first and see if this setup really works on your other PR. 🤞

Or feel free to cherry pick the commits over and close this without merge.