Cap Python to 3.6 to avoid Xenial workaround

Some limitation to travis. Hopefully will be fixed soon?

https://github.com/travis-ci/travis-ci/issues/9815

diff --git a/.travis.yml b/.travis.yml
index 68db58b7288b297dd4bdb9b60068cf5c7b35aef5..a18fe766ae2e32f80e51992e38fb233d4fdb36d6 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,15 +9,14 @@ python:
   - '3.4'
   - '3.5'
   - '3.6'
-  - '3.7'
   - pypy
 
 matrix:
   include:
-  - python: 3.7
+  - python: 3.6
     env:
     - TOXENV=flake8
-  - python: 3.7
+  - python: 3.6
     env:
     - PUBLISH="true"
     install: