Fix testing on python 3.10

[ev-br]

Implement the suggestion from HypothesisWorks/hypothesis#4606 (comment)

Note: this PR is fully drafted by Copilot. The full history of prompts is at ev-br#2
My act is only to provide prompts and review the resulting PR.

The patch itself is fairly trivial. The trick is that it's a first patch prepared by a bot. So this should probably serve as a blueprint of how we want to deal with bot-authored commits.
Yay/nay @rgommers @kgryte @asmeurer ?

If we go with it, my plan is to squash-merge the PR, edit the commit message and keep copilot's authorship.

[ev-br]

To clarify my position: I think it's OK to merge this kind of bot-generated patches, provided

• they are reviewed with the same level of scrutiny as PRs from a human I never met behind a github username I never seen.
• The reviewer information is somehow recorded in the commit message. Specific way TBD: reviewed-by or signed-off-by from one of us with the commit bit.

The remaining concern is around copyright, as detailed at length at the Discourse thread.

[rgommers]

I think it's OK to merge this kind of bot-generated patches, provided

That seems fine to me for this project.

The remaining concern is around copyright

Yes, copyrightable contributions need separate discussion I think. This one isn't copyrightable though, the only nontrivial content comes directly from Hypothesis and a review comment by a Hypothesis maintainer. So all good to move ahead here.