[FEAT] test python 3.10, 3.11

[NickCrews]

I am using splink with python 3.11 and it is working fine, but I would feel better if splink were tested against that. Is there anything preventing me from writing a PR that simply adds this to the config so 3.10 and 3.11 are run in tests and CI?

[ADBond]

There's no fundamental reason why we don't do this - I believe initially we excluded >= 3.10 just as there was some sort of dependency issue that needed resolving to get things running in CI (maybe something with numpy?), and have not got round to adding yet.

Would be good to have newer versions tested though, so would be happy if you did manage to add these in okay

[ADBond]

See the PR initially adding multiple versions for testing, although realise I have not explained in much detail there precisely what was causing difficulties

[ADBond]

Closed by #2164