Removed 3.6 marker, added 3.10

Author: vladmunteanu

setup.py

@@ -39,10 +39,10 @@
         'Topic :: Internet :: WWW/HTTP',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
-        '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',
     ],
     zip_safe=False,