Feature request: `PYRIGHT_PYTHON_FORCE_VERSION=github`

[bersbersbers]

I'd love if I could use pyright-python to test the latest version of pyright from GitHub (irrespective of any release cycle). Not sure if this is even possible, but I read that npm can install from a GitHub link, so that might be doable easily.

[RobertCraigie]

Sorry for the delayed response and thanks for the feature request.

This sounds like a useful feature so I'd be happy to accept a PR :)