Officially support Python 3.7+

[JeppeKlitgaard]

Currently Python 3.6 is the most recent supported version according to the classifiers specified in setup.cfg.

Python 3.6 is due to lose support later this year and most will probably have migrated to Python 3.8 or 3.9 at this point.

As far as I can tell shellingham works perfectly fine on these more recent Python versions - it might be worthwhile to make the classifiers reflect this and perhaps set up a Python version test matrix on CI?

[uranusjr]

Absolutely! A pull request would be very welcomed.

[JeppeKlitgaard]

I'll gladly put something together, though I am not entirely sure how to implement the test matrix on Github Actions.

Thanks for getting back to me so quickly!

[JeppeKlitgaard]

@uranusjr would you consider removing support for old Python versions, or would you prefer to keep support for Python 2?

The following versions have reached end of life:

• Python 2.6
• Python 2.7
• Python 3.4
• Python 3.5

(see also: https://endoflife.date/python)