PyBuilder 0.13.16-0.13.17: Free-Threaded Python and PEP 517 Build

Two releases bring significant modernization to PyBuilder’s packaging pipeline:

0.13.16 adds support for free-threaded Python (3.13t and 3.14t), where the GIL is disabled. Free-threaded builds get their own venv directories (suffixed with t) to keep ABI-incompatible packages separate. This release also fixes deprecation warnings from the pkg_resources module.

0.13.17 migrates distribution building from the legacy python setup.py sdist/bdist_wheel invocation to the PEP 517 build module. This aligns PyBuilder with the modern Python packaging ecosystem and avoids deprecation warnings from setuptools.

See the release notes for details.