Jvm

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- Add support for Python 3.10, 3.11, 3.12 and 3.13
- Drop support for Python 3.7 and 3.8
- Add support for PyPy 3.9 and 3.10
- pvm.h has been included for further development.
- Tox configuration has been moved to pyproject.toml
- Setup update (now based on tox >= 4.0).
- Fix the bug in lib/classproperty.
- Fixes for bugs in JVMFinder's.
- Copyright year update.
- Unittest have been performed for much more JVMs.
- Setup fixes.
- Setup (dependencies) update.

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- Drop support for Python 3.6
- Setup update.

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- dll_path argument of JVM() can also be type os.PathLike.
- Copyright year update.
- Setup update.

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- Add support for Python 3.9
- General update, improvements and cleanup.
- Setup update.
- Elimination of dependence on _testcapi.

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- Drop support for Python2
- Update of Mozilla Rhino.
- Update of license info.
- Setup update.

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- Last release for Python2