Remove support for Python 3.8

[hagenw]

Removes support for Python 3.8, which has reached its end-of-life.

As with Python 3.9 we can also use list[str] for type hinting instead of typing.List[str], I also removed the typing module and replaced it with other code, including the type hinting union syntax introduced in Python 3.10, which is now also shown in the compiled documentation and makes it easier to read:

Summary by Sourcery

Remove support for Python 3.8 by updating type hint syntax to use PEP 604 style and adjusting CI configuration to exclude Python 3.8.

CI:

• Update CI configuration to exclude Python 3.8 from the testing matrix.

Chores:

• Remove support for Python 3.8 from the codebase.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request removes support for Python 3.8, which has reached its end-of-life. The changes primarily involve updating type hints and removing Python 3.8 from the test matrix.

Architecture diagram for updated test matrix in CI workflow

graph TD;
    A[CI Workflow] --> B[Matrix Configuration];
    B --> C[OS: ubuntu-latest, windows-latest, macos-latest];
    B --> D[Python Versions: 3.9, 3.10, 3.11, 3.12];

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Updated class diagram for type hints in audplot/core/api.py

classDiagram
    class API {
        +cepstrum()
        +confusion_matrix(truth: Sequence | pd.Series, prediction: Sequence | pd.Series, labels: Sequence, label_aliases: dict, percentage: bool, show_both: bool, ax: matplotlib.axes.Axes)
        +combine_string(x, y)
        +detection_error_tradeoff(x: Sequence | pd.Series, y: Sequence | pd.Series, error_rates: bool, xlim: Sequence, ylim: Sequence, label: str, ax: matplotlib.axes.Axes) : Callable
        +distribution(truth: Sequence | pd.Series, prediction: Sequence | pd.Series, ax: matplotlib.axes.Axes)
        +human_format(number: int | float) : str
        +scatter(truth: Sequence | pd.Series, prediction: Sequence | pd.Series, fit: bool, order: int, ax: matplotlib.axes.Axes)
        +series(truth: Sequence | pd.Series, prediction: Sequence | pd.Series, ax: matplotlib.axes.Axes)
        +waveform(x: np.ndarray, text: str, color: str | Sequence[float], background: str | Sequence[float], linewidth: float, ylim: Sequence[float], ax: matplotlib.axes.Axes)
    }

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File-Level Changes

Change	Details	Files
Update type hints to use more modern Python syntax	Replace typing.Union with the `	operator for union types</li><li>Replacetyping.SequencewithSequence</li><li>Replace typing.Dictwithdict</li><li>Replace typing.CallablewithCallable`
Remove Python 3.8 from the test matrix in GitHub Actions workflow	Update the python-version matrix to start from '3.9' instead of '3.8'	.github/workflows/test.yml

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[sourcery-ai]

Hey @hagenw - I've reviewed your changes - here's some feedback:

Overall Comments:

• There's a small typo in the waveform function. The type hint for the background parameter should be str | Sequence[float] instead of str, | Sequence[float]. Please remove the extra comma.

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.0%. Comparing base (aefafcd) to head (fd93e79).
Report is 1 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
audplot/core/api.py	100.0% <100.0%> (ø)

[ChristianGeng]

The bot has done a good job in finding the few clerical errors left.
It feels safe to approve.