Merge pull request #318 from dleen/master

Enable Python 3.7 on travis

Author: rolweber

.travis.yml

@@ -1,10 +1,12 @@
+dist: xenial   # required for Python >= 3.7
 sudo: false
 language: python
 python:
     - 2.7
     - 3.4
     - 3.5
     - 3.6
+    - 3.7
 
 env:
     - ASYNC_TEST_TIMEOUT=10