Py3.8 on tox.ini

Author: humitos

tox.ini

@@ -15,7 +15,7 @@ passenv = CI TRAVIS TRAVIS_* HOME
 deps = -r{toxinidir}/requirements/testing.txt
 changedir = {toxinidir}/readthedocs
 basepython =
-    python3.6
+    python3.8
 commands =
     /bin/sh -c '\
         export DJANGO_SETTINGS_MODULE=readthedocs.settings.test; \