feat: Drop python 3.7-3.9, support 3.11, 3.12

[esafak]

Description

Bring python support up-to-date, dropping older versions.

Checklist

• [ ] I've added this contribution to the changelog.md.
• [ ] I've added my name to the AUTHORS file (or it's already there).

[amjith]

@esafak I'm happy to add the 3.11 and 3.12 classifiers. But I'm not sure why we need to drop 3.8 and 3.9 support.

[esafak]

I just remove old versions out of habit. Do you want them back?