Update Python version

Author: tdewolff

.github/workflows/python.yml

@@ -123,7 +123,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.11'
+        python-version: '3.13'
     - uses: actions/setup-go@v5
       with:
         go-version: '>=1.23'

bindings/py/setup.py

@@ -42,6 +42,7 @@ def build_extension(self, ext: Extension):
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Topic :: Internet :: WWW/HTTP",
         "Topic :: Software Development :: Pre-processors",
         "Topic :: Text Processing :: Markup",