Add Python 3.14 support

Python 3.14 was released October 2025 and is now the latest stable.
Add it to the CI test matrix and the PyPI classifiers. The test suite
passes on 3.14 (342 tests, OK with skipped=2, expected failures=10).

python_requires remains >=3.10 — it is a floor, so newer versions are
already permitted; only the matrix (testing) and classifiers
(advertising) need the bump.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: derek73

.github/workflows/python-package.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
     - uses: actions/checkout@v4

setup.py

@@ -30,6 +30,7 @@ def read(fname):
           'Programming Language :: Python :: 3.11',
           'Programming Language :: Python :: 3.12',
           'Programming Language :: Python :: 3.13',
+          'Programming Language :: Python :: 3.14',
           'Development Status :: 5 - Production/Stable',
           'Natural Language :: English',
           "Topic :: Software Development :: Libraries :: Python Modules",