tox: drop py33

mmlb · mmlb · commit d3e9c850f734 · 2018-08-20T11:19:11.000-04:00
wheel no longer support python 3.3 and so tox is unable to test it
diff --git a/tox.ini b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py33,py34,py35,py36
+envlist = py27,py34,py35,py36
 skip_missing_interpreters=True
 
 [testenv]
