Add py.typed file to mark package as type-annotated, merge into pyproject.toml

[parker-research]

See commits for individual descriptions of each change.

This fixes #31, albeit in a slightly different way than requested in that project.

[vb64]

Please restore the build/.gitignore file.

It is necessary to avoid creating the build directory when running test suite.

[parker-research]

Why isn't including build/ in the root .gitignore file adequate? That's by far the standard way to do that...

[vb64]

Ok.

But now we need to solve the problem with failed tests under Python 3.8

[parker-research]

Can you just drop Python 3.8 support? Seems like it requires hacks/workarounds, and it's pretty well out of use now.

Python3.8 is an unsupported version, and no longer even receives security updates: https://devguide.python.org/versions/

If not, I'll look at fixing it though. Am curious why it fails

[vb64]

No.

3.8 is the latest version of Python that runs on Windows 7. It is a must for those people and organizations that initiated the creation of this module.

[parker-research]

Maintaining support for Windows 7 (which has been past EOL for 2 years now) is a hilarious reason to maintain backwards compatibility. People using Windows 7 certainly shouldn't be expecting up-to-date dependencies - I certainly wouldn't even try to upgrade if I was in that boat.

[parker-research]

Anyway, pretty sure it was a trivial fix there. Would be nice if workflows ran automatically on PRs - would you mind retriggering the tests (which seem to pass locally for me)?

[parker-research]

Is this in the latest release? I'm still getting the error in Pyright