adding py 3.13 to setup.py

Author: seperman

setup.py

@@ -56,6 +56,7 @@ def get_reqs(filename):
           "Programming Language :: Python :: 3.10",
           "Programming Language :: Python :: 3.11",
           "Programming Language :: Python :: 3.12",
+          "Programming Language :: Python :: 3.13",
           "Programming Language :: Python :: Implementation :: PyPy",
           "Development Status :: 5 - Production/Stable",
           "License :: OSI Approved :: MIT License"