Dropping Python <3.12 support

[matthewyang204]

I'm dropping support for Python versions 3.11 and below. This allows the code to be cleaner, with quotes inside of f-strings, etc. No operating systems have been dropped; they just need to update their Python. I use this special build of Python 3.12 to build the Windows version; it supports WIndows 7-8.1 as well without dropping any features. Please use this build if you are on Windows 7-8.1. It's found in the main README.

[matthewyang204]

Python 3.4 support added back over the weekend. Closing.