📝 add Python 3.13 to versions list

Author: ianardee

pyproject.toml

@@ -19,6 +19,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Operating System :: OS Independent",
   "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Developers",