Add support Python 3.10

Author: glemaitre

setup.py

@@ -49,10 +49,10 @@
     "Operating System :: POSIX",
     "Operating System :: Unix",
     "Operating System :: MacOS",
-    "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",
 ]
 INSTALL_REQUIRES = (min_deps.tag_to_packages["install"],)
 EXTRAS_REQUIRE = {