setup: Mark Python 3.9 as supported

tbabej · tbabej · commit 44c2f518d24c · 2021-09-12T21:40:09.000-04:00
diff --git a/setup.py b/setup.py
@@ -31,6 +31,7 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         'License :: OSI Approved :: BSD License',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Intended Audience :: Developers',
