Update pixi configurations

[travishathaway]

With the release of 0.13.0 pixi now supports defining multiple environments. This is beneficial for this package because it helps us more easily test different versions of Python. This should also make the CI test runners go quicker as they need to spend less time recalculating the lock file.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.98%. Comparing base (4bc16e4) to head (bf1e6c7).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #38   +/-   ##
=======================================
  Coverage   97.98%   97.98%           
=======================================
  Files          14       14           
  Lines         347      347           
=======================================
  Hits          340      340           
  Misses          7        7           

Flag	Coverage Δ
3.11	?
3.8	?
Linux	97.98% <ø> (ø)
Windows	98.20% <ø> (ø)
dev-py310	97.98% <ø> (?)
dev-py311	97.98% <ø> (?)
dev-py312	97.98% <ø> (?)
dev-py38	97.94% <ø> (?)
dev-py39	97.94% <ø> (?)
macOS	97.98% <ø> (ø)

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[pavelzw]

btw you can also do default = ["dev"] which results in pixi run test using the dev feature directly.

[travishathaway]

Thanks for the recommendations @pavelzw.