Add support for standard list type hints

[smt5541]

🛠 Changes being made

Give examples of the changes you've made in this pull request. Include an itemized list if you can.

• Update ValidateParameters#__call__ and ValidateParameters#validate to support list alongside the existing support for typing.List
• Update GitHub Actions to run tests on Python 3.9-3.12
• Update setup.py to add supported version information and additional PyPI classifiers

🧠 Rationale behind the change

Why did you choose to make these changes?

Reading through the typing documentation, I noticed that typing.List was deprecated as of Python 3.9. Since this library currently targets Python 3.9 at a minimum per some of its dependencies, it seems this would be a fitting change

Does this pull request resolve any open issues?

Closes #48

Were there any trade-offs you had to consider?

I had to ensure that our minimum supported Python version would not be changed by implementing this support. Our dependencies pin us to a minimum of Python 3.9, so it seems we remain at that level.

🧪 Testing

• [X] Have tests been added or updated for the changes introduced in this pull request?

• [X] Are the changes backwards compatible?

If the changes aren't backwards compatible, what other options were explored?

✨ Quality check

• [X] Are your changes free of any erroneous print statements, debuggers or other leftover code?

• [X] Has the README been updated to reflect the changes introduced (if applicable)?

💬 Additional comments

Feel free to add any further information below

Depends on #45

[Ge0rg3]

I think to resolve current conflicts we can just take this branch version as source of truth?

[smt5541]

I think to resolve current conflicts we can just take this branch version as source of truth?

Eh, mostly - some indentations introduced in other PRs made it a little messier, but that's all set now

[Ge0rg3]

Btw love the added pypi classifiers on this, should help with project visibility 👍