Fixes #48

[tensorturtle]

Fixes #48

Changes:

• Restore backward compatible expected behavior for get_fitness_machine_feature method, which in v0.4.0 was changed to return a tuple, where it was previously not a tuple. Add two convenience methods to this end.
• Improve singular/plural naming internally.
• Fix type annotations

[tensorturtle]

@zacharyedwardbull Can you take a look at this? The Github actions CI fails for Python 3.7 only. Did it get deprecated at some point in the recent past?

Edit: Looking at the github actions logs, it seems that the Ubuntu version was automatically upgraded (now running 24.04), for which a python 3.7 build does not exist. I manually checked the link provided in the error https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json and for python 3.7, only up to ubuntu 22.04 is supported.

How would you like to proceed? I think both paths are reasonable:

• Edit github actions to run on ubuntu 22.04
• Deprecate python 3.7 support for this lib.

[zacharyedwardbull]

Hi @tensorturtle thanks for creating this fix. I've updated the python test versions in 3132d08 to remove 3.7 and add the newer versions. Please rebase and then the tests should pass.

[tensorturtle]

@zacharyedwardbull Thank you. It's ready.

[zacharyedwardbull]

Merged, thanks @tensorturtle!