Add classifiers as supported by CI (#313)

Author: jonathan-s

setup.py

@@ -63,6 +63,9 @@ def parse_dist_meta():
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Topic :: Software Development :: Libraries :: Python Modules",
     ],
     install_requires=["Django>=2.2"],