Python 3.8 or higher required

[Zandengoff]

Went to patch the latest version and found I had to install python 3.8 to get the patching to function. The operator := is not valid in earlier versions and prevents patching. As I had additional versions of python on the machine, I also had to edit the main patching tools script to specify python3.8 instead of python as well. Might be something to add to the readme file?