Polyclonal

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- Correctly implement change in ``icXX`` intended in version 6.1.

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- Increase range of concentrations accepted by ``icXX`` methods.

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- Upgrade minimum ``altair`` to 5.0.0
- Use ``ruff`` as linter rather than ``flake8``
- Add ``Polyclonal.mut_icXX_df`` method
- Add ``Polyclonal.mut_icXX_plot`` method
- Add ``PolyclonalCollection.mut_icXX_df_replicates``, ``PolyclonalCollection.mut_icXX_df``, and ``PolyclonalCollection.mut_icXX_df_w_model_values`` methods.
- Add ``PolyclonalCollection.mut_icXX_plot`` method

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- Add *min_escape_magnitude* as an option for ``PolyclonalAverage`` escape averages and plots. This gives the value across models with the lowest magnitude (smallest absolute value).

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- In ``polyclonal.plot.lineplot_and_heatmap``, apply any hiding filter sliders before doing the max of the stat at the site slider. This avoids showing sites with all hidden values when trying to look at max.
- Pass ``nbval`` tests with ``pandas`` 2.0.

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- Update to using ``altair`` version 5.0.0rc1, which can be installed by `pip`. This also means for the first time ``polyclonal`` itself can be on PyPI, which changes installation instructions.