Python: Verify support for Python 3.13

Author: amotl

.github/workflows/test.yaml

@@ -27,6 +27,7 @@ jobs:
           "3.10",
           "3.11",
           "3.12",
+          "3.13",
           "pypy3.10",
         ]
 

setup.py

@@ -133,6 +133,7 @@ def run(self):
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Internet :: WWW/HTTP",