[python-pytrakt] Add GitHub Actions workflow to publish to pypi

[glensc]

This will create pip package and upload to pypi when git tag is pushed to GitHub.

Inspired from:

• Add pypi publish workflow Taxel/PlexTraktSync#510

Docs:

• https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python#publishing-to-package-registries

Needs to setup token PYPI_TOKEN as Secrets:

• https://pypi.org/help/#apitoken

Refs:

• PyTrakt Maintenance #199

[glensc]

@moogar0880 are there any modifications you do before publishing to PyPI?

I noticed the BASE_URL differs with Git:

-BASE_URL = 'https://api-v2launch.trakt.tv/'
+BASE_URL = 'https://api.trakt.tv/'

[glensc]

@moogar0880 otherwise set up PYPI_TOKEN secret and this is ready to go!

[glensc]

Carried to my fork:

• glensc/python-pytrakt@4d09a72