chore(deps): update dependency jsonpickle to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
jsonpickle	==3.3.0 -> ==4.0.0

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Release Notes

jsonpickle/jsonpickle (jsonpickle)

v4.0.0

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* Breaking Change: Python 3.7 is no longer supported.
* Breaking Change: Support for pre-0.7.0 repr-serialized objects is no
longer enabled by default. The safe option to decode() was changed from
False to True. Users can still pass safe=False to decode() in order
to enable this feature for the purposes of loading older files, but beware that
this feature relies on unsafe behavior through its use of eval(). Users are
encouraged to re-pickle old data in order to migrate away from the the unsafe loading
feature. (+514)
* The pickler no longer produces py/repr tags when pickling modules.
py/mod is used instead, as it is clearer and uses one less byte. (+514)
* The test suite no longer uses the deprecated datetime.datetime.utcnow()
function. (+539)

v3.4.2

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* The breaking changes from v4 were inadvertedly included in v3.4.1, which has
been yanked. This release remedies this by reverting the v4 changes.

v3.4.1

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* Support decoding pandas dataframes encoded with versions 3.3.0 and older. (+536)

v3.4.0

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* Officially support Python 3.12 in the GitHub Actions testing matrix, and update
GHA package versions used. (+524)
* Improve reproducibility of benchmarking commands on Linux by using taskset and
adding a "HOWTO" run benchmarks section in benchmarking/README.md. (+526)
* The setup.cfg packaging configuration has been replaced by
pyproject.toml. (+527)
* yaml is now supported as a jsonpickle backend. (+528)
* OSSFuzz <https://github.com/google/oss-fuzz>_ scripts are now available in
the fuzzing/ directory. (+525)
* Pure-python dtypes are now preserved across encode()/decode() roundtrips
for the pandas extension. (#​407) (+534)
* Pandas dataframe columns with an object dtype that contain multiple different
types within (e.g. a column of type list[Union[str, int]]) now preserve the types
upon being roundtripped. (#​457) (#​358) (+534)
* Fix warnings in the test suite regarding numpy.compat usage. (#​533) (+535)

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