Update deephaven-plugin to latest, fixed API breaking changes

[niloc132]

I was unable to confirm that the tests are passing, there is no command in docs or CI files that show how to run them. We used python -m unittest discover test/deephaven to try to run them (without the deephaven suffix, there is a package shadowing issue from the empty __init__.py files that possibly should be removed?).

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ERROR: test_basic_area (plot.express.plots.test_area.AreaTestCase)
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Traceback (most recent call last):
  File "/home/colin/workspace/deephaven-plugin-plotly-express/test/deephaven/plot/express/plots/test_area.py", line 24, in test_basic_area
    chart = dx.area(self.source, x="X", y="Y").to_dict(self.exporter)
  File "/home/colin/workspace/deephaven-plugin-plotly-express/src/deephaven/plot/express/deephaven_figure/DeephavenFigure.py", line 168, in to_dict
    return json.loads(self.to_json(exporter))
  File "/home/colin/workspace/deephaven-plugin-plotly-express/src/deephaven/plot/express/deephaven_figure/DeephavenFigure.py", line 194, in to_json
    return json.dumps(payload)
  File "/home/colin/.pyenv/versions/3.10.11/lib/python3.10/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/home/colin/.pyenv/versions/3.10.11/lib/python3.10/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/home/colin/.pyenv/versions/3.10.11/lib/python3.10/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/home/colin/.pyenv/versions/3.10.11/lib/python3.10/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type MagicMock is not JSON serializable

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Ran 1 test in 6.449s

We did verify that the changes work by using the current version of the plotly-express plugin and installing this wheel. The above failure looks legit, a mock maybe shouldn't be serializable, but I wasn't sure how this should go.

[mofojed]

@jnumainville will need to take a look at the tests when he gets back on Monday. He's also working on wiring up the tests in CI (and putting plugins in a monorepo so we don't need to make updates across N repos for N plugins).