Python 2.7 no longer exists

[Pomax]

https://github.com/Microsoft/nodejs-guidelines/blob/master/windows-environment.md#prerequisites says to install python 2.7 - that version has been EOL for years now, and installing it would be a giant security hole. Please fix the documentation to not tell people to install it, or if Python 2.7 is required: archive this repo, because that means this project is not compatible with the past several years of Python.