Merge pull request #525 from eriknw/update_python_versions

Update supported Python versions in setup.py

Author: eriknw

setup.py

@@ -32,5 +32,7 @@
           "Programming Language :: Python :: 3.6",
           "Programming Language :: Python :: 3.7",
           "Programming Language :: Python :: 3.8",
+          "Programming Language :: Python :: 3.9",
+          "Programming Language :: Python :: 3.10",
           "Programming Language :: Python :: Implementation :: CPython",
           "Programming Language :: Python :: Implementation :: PyPy"])