Various docs changes for CI (backport #253)

[mergify]

This is an automatic backport of pull request #253 done by Mergify.
Cherry-pick of dd2ad0d has failed:

On branch mergify/bp/stable/0.3/pr-253
Your branch is up to date with 'origin/stable/0.3'.

You are currently cherry-picking commit dd2ad0d.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   docs/conf.py
	modified:   tox.ini

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   requirements-dev.txt

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[coveralls]

Pull Request Test Coverage Report for Build 4670094335

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 75.793%

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Totals
Change from base Build 4493725209:	0.0%
Covered Lines:	645
Relevant Lines:	851

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💛 - Coveralls