Update .travis.yml

sserrata · web-flow · commit f58c6aaa7078 · 2018-03-16T15:00:18.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -18,3 +18,8 @@ python:
 - 3.5
 - 2.7
 script: tox
+
+# safelist
+branches:
+  only:
+  - master
