GeezerVison

Thanks for the contribution! Although since all of the PRs essentially modernize the codebase by dropping support of python 3.9, should we just merge this PR instead of all three?

@tharropoulos The draft ones are waiting for their dependents to be merged and then I will rebase them. I'd prefer to keep them separate if that's okay.

Fine by me

Cc: @kishorenc

@kishorenc Can we merge this? It's need it for the upcoming streaming conversation PR (3.9 doesn't include support for unions using the pipe operator |)

There's a conflict now that needs to be resolved.