Update setup.py with all tested python versions (#442)

Author: kvid

setup.py

@@ -39,6 +39,10 @@
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.7",
         "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",
         "Topic :: Utilities",
         "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
     ],