Create Stub File for Type Annotation

[diegostammer]

Using VSCode with pylance plugin in strict mode generate a lot of errors about missing type annotation. The request is to create a stub file (*.pyi) to document every type of constants, methods, functions, etc.

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

[fruch]

@diegostammer this package is quite old, when before there was type annotation available.

If you want to give a contribution and add those extra documentation files, PRs are welcomed