Another try still only running 2.7.

Author: rouilj

.travis.yml

@@ -2,14 +2,16 @@ language: python
 
 matrix:
   include:
-    - python:
-        - 2.7
-        - 3.4
-        - 3.5
-        - 3.6
+    - "Python <= 3.6"
+      python:
+        - "2.7"
+        - "3.4"
+        - "3.5"
+        - "3.6"
   allow_failures:
     - name: "Python >3.6"
-      python: 3.7
+      python:
+        - "3.7"
       dist: xenial
 
 sudo: false