Updates from the package template

[SunPyBot]

This is an autogenerated PR, which applies the latest changes from the SunPy Package Template.

If this pull request has been opened as a draft there are conflicts which need fixing.

To run the CI on this pull request you will need to close it and reopen it.

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[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 2.4
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 0129af40f293a357bba3df74243d59daf2b89a9d

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #955: Updates from the package template'

4. Push to a named branch:

git push YOURFORK 2.4:auto-backport-of-pr-955-on-2.4

5. Create a PR against branch 2.4, I would have named this PR:

"Backport PR #955 on branch 2.4 (Updates from the package template)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.