Fixed broken build, made file paths OS-agnostic

[chriscarrollsmith]

• Updated dependencies
• Replaced clifier with click because clifier is unmaintained and was forcing pyyaml to an old version that breaks the poetry build
• Made file path handling OS-agnostic so tests will pass on Windows

[chriscarrollsmith]

Also removed the tests for Python versions prior to 3.12. While backward-compatibility with old Python versions is an admirable goal, poetry handles this by forcing dependencies to the last version that was compatible with the earliest of the Python versions you want to support. In projects that use numpy, this unfortunately breaks compatibility with Python 3.12. (3.12 comes bundled with numpy >2.0, and an error gets thrown if poetry tries to install a version older than that as a project dependency. It's a whole thing. But the long and short of it is that even if your tests pass on >3.12, most users of >3.12 won't be able to install the project.)

[xnuinside]

@chriscarrollsmith thanks for opening the pr, I will check tomorrow and merge

[chriscarrollsmith]

Sorry; thought I had already pushed the fix for that error.

[xnuinside]

@chriscarrollsmith thanks for the PR!