Stub File

[diegostammer]

Hello,

This is a improvement request.
Include a stub file in this project to be compatible with python type annotation.

https://www.python.org/dev/peps/pep-0484/
https://www.python.org/dev/peps/pep-0561/

This is very useful with pylance in stricrt mode on VSCode. For now we are obliged to create a stub file mannualy.