Registered new python version for tests

Author: Bernardo-MG

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{3.6,3.7,3.8,3.9},
+    py{3.6,3.7,3.8,3.9,3.10},
     check,
     docs
 skip_missing_interpreters =