chore: add python 3.14

Author: sbillinge

pyproject.toml

@@ -14,7 +14,7 @@ maintainers = [
 description = "Configuration utilities for project. Part of xPDFsuite"
 keywords = ['diffpy', 'pdf', 'data interpretation']
 readme = "README.rst"
-requires-python = ">=3.11, <3.14"
+requires-python = ">=3.11, <3.15"
 classifiers = [
         'Development Status :: 5 - Production/Stable',
         'Environment :: Console',
@@ -28,6 +28,7 @@ classifiers = [
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: 3.13',
+        'Programming Language :: Python :: 3.14',
         'Topic :: Scientific/Engineering :: Physics',
         'Topic :: Scientific/Engineering :: Chemistry',
 ]