GHA CI is not running unittests, unittests broken in master

[Jamie-]

It doesn't appear that your Github Actions CI is running your unittests. As a result of this, it appears that you have some unittests broken in master.

Running locally I see these failing:

• test_currencies
• test_languages
• test_locales
• test_has_version_attribute

[ctheune]

Yeah, this is definitely missing. We should be running this with a matrix build for the supported Python versions.

[zware]

Fixed in #140/ #164.