Pi 5 / Bookworm Edition - Fixes!

Like 1.0.x, this release is a significant change to EnviroPlus that swaps out the GPIO library from RPi.GPIO to the upstream compliant gpiod.

There are still some wrinkles with this new way of doing things, but this library should work for the most part on Bullseye/Bookworm, excepting some minor install issues documented in #129 . 😭