P. L. Lim

Maaaybe we need to hold off on this until we unpin Sphinx. The coordinate imports galore already broke compat with Sphinx. I don't want this to break it more.

Might need a rebase to pick up the new wcslib that Mihai just added to this repo?

Alas, even adding `__radd__` in `Spectrum1D` will not fix this because `Quantity.__add__` takes precedent. If I create a bogus class with both `__add__` and `__radd__`, I get this error, so...

new pytest was released too 😬

> if h5py is removed from install_requires here and just kept as test dep, that will not affect your test-deps downstream, right? Correct.

Yes, if you deem it sufficient, you can close #2341 without merge and go with this PR. Thanks!

Has conflict now. Please rebase. Thanks!

Is it possible to not change the displayed job names (like having "/ tests /" or "/ allowed_failures /" so I don't have to update the branch protection rules?

Can we modify the templates? That text seems redundant and makes the CI name even longer.

> updating the branch protection shouldn't take that much time, right? Would be a pain if you have a lot of other repos though... Is it not possible at all?