Add automatic workflow for PyPI release

[mscheltienne]

PR independent from #23

This PR adds an automatic workflow that handles the PyPI release. It triggers on a GitHub release (e.g. if you create a release with target: main, it triggers with the branch main; if you create a release with target: maint/1.0, it triggers with the branch maint/1.0).

This workflow requires the PYPI_API_TOKEN to be added to your repository secrets. Instructions:

• On PyPI, log in and go to "account settings" (Not to the project, or to the project settings!)

• Scroll down to API token

• Create a token scoped for python-steam-api

• Copy the token, it should start with pypi-

• On GitHub, on this repository, go to Settings -> Secrets and Variable -> Actions

• Add a new Repository Secret, name PYPI_API_TOKEN, secret the copied token (includingthe start pypi-)

[deivit24]

hey! This looks great!

Thanks for making these changes. Funny enough the company I work for just did a massive migration from Gitlab to GitHub and I was learning about GitHub actions and stuff like that.

Going to merge this and then update the read me a bit so people can use os.environ to get the STEAM_API_KEY