Dropping 3.9 support

Author: glenrobson

setup.py

@@ -33,7 +33,6 @@ def run(self):
                  "Intended Audience :: Developers",
                  "Operating System :: OS Independent",
                  "Programming Language :: Python",
-                 "Programming Language :: Python :: 3.9",
                  "Programming Language :: Python :: 3.10",
                  "Programming Language :: Python :: 3.11",
                  "Topic :: Internet :: WWW/HTTP",