install fails with pip >= 23.1

[dave-voltdb]

There have apparently been packaging changes that the 'twofish' requirement hasn't kept up with.

$ pip install pyjks
.......
   [JUnit5] Building wheels for collected packages: twofish
   [JUnit5]   Building wheel for twofish (pyproject.toml): started
   [JUnit5]   Building wheel for twofish (pyproject.toml): finished with status 'error'
   [JUnit5] Failed to build twofish
   [JUnit5]   error: subprocess-exited-with-error
   [JUnit5]   
   [JUnit5]   × Building wheel for twofish (pyproject.toml) did not run successfully.
   [JUnit5]   │ exit code: 1
   [JUnit5]   ╰─> [18 lines of output]
   [JUnit5]       /tmp/pip-build-env-kczyp22g/overlay/lib/python3.12/site-packages/setuptools/dist.py:759: SetuptoolsDeprecationWarning: License classifiers are deprecated.
   [JUnit5]       !!
   [JUnit5]       
   [JUnit5]               ********************************************************************************
   [JUnit5]               Please consider removing the following classifiers in favor of a SPDX license expression:
   [JUnit5]       
   [JUnit5]               License :: OSI Approved :: BSD License
   [JUnit5]       
   [JUnit5]               See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
   [JUnit5]               ********************************************************************************
   [JUnit5]       
   [JUnit5]       !!
   [JUnit5]         self._finalize_license_expression()
   [JUnit5]       twofish.c:11:10: fatal error: Python.h: No such file or directory
   [JUnit5]          11 | #include <Python.h>
   [JUnit5]             |          ^~~~~~~~~~
   [JUnit5]       compilation terminated.
   [JUnit5]       error: command '/usr/bin/x86_64-linux-gnu-gcc' failed with exit code 1
   [JUnit5]       [end of output]
   [JUnit5]   
   [JUnit5]   note: This error originates from a subprocess, and is likely not a problem with pip.
   [JUnit5]   ERROR: Failed building wheel for twofish
   [JUnit5] ERROR: Could not build wheels for twofish, which is required to install pyproject.toml-based projects