MAINT: dropping sphinx<7 and python<3.10 versions

[bsipocz]

closes #214 (as the sphinx relevant changes got cherry-picked into here)

[bsipocz]

I was not able to edit #214 therefore cherry-picked the fixes from there.

[bsipocz]

@djungelorm - I'm trying to reach out regarding sorting out PyPI permissions but couldn't find your email address. If you see this, could you please let me know so we can get the release for this package out sooner rather than later? Thanks!

[dprada]

I was not able to edit #214 therefore cherry-picked the fixes from there.

No problem. I saw your messages late. Well done.
I will make changes available for maintainers in future PRs.
Thanks for your work on this.

[djungelorm]

@djungelorm - I'm trying to reach out regarding sorting out PyPI permissions but couldn't find your email address. If you see this, could you please let me know so we can get the release for this package out sooner rather than later? Thanks!

Sure, what do you need? You can contact me on here or at alexjcollins@gmail.com

I'm not really active on the project any more, so happy to transfer pypi permissions to someone else

[bsipocz]

Thanks! email is sent.