Be explicit about dropping Python 2 and clean up dependencies.
Review Request #13694 — Created April 3, 2024 and submitted — Latest diff uploaded
Review Bot, especially on the worker side, was still claiming Python 2
compatibility. This change gets rid of that, making everything 3.8+.
While I was in here I cleaned up all the old compatibility pins for
dependencies.
Ran setup.py develop for both bot and extension.