chore: fix tox ini typo

Author: untitaker

tox.ini

@@ -13,8 +13,8 @@ envlist =
     {py3.5,py3.6,py3.7}-django-dev
     {py3.5,py3.6,py3.7}-django-{2.0}
     {pypy,py2.7,py3.5}-django-1.11
-    {pypy,py2.7,py3.4,py35}-django-{1.8,1.9,1.10}
-    {pypy,py2.7,py3.4,py35}-django-1.8
+    {pypy,py2.7,py3.4,py3.5}-django-{1.8,1.9,1.10}
+    {pypy,py2.7,py3.4,py3.5}-django-1.8
     {pypy,py2.7,py3.4}-django-1.7
     {pypy,py2.7}-django-1.6