Update dependencies for Python > 3.11 support

[mcosti]

I've tested the basics and everything still work.

Please consider separating the packages not needed for the library itself (like pytest) into a separate requirements file, otherwise a lot of conflicts will come up when installing in an existing codebase

Thank you for your work!

[benfmiller]

Thanks for doing this! Looks like all the tests pass for 3.11, so this will remove support for 3.8 for next version.

I'll separate out testing dependencies as well for next version

[mcosti]

Thank you! I made a new commit to change the github build

[benfmiller]

Thanks! Looks great