Allow failure on the tip version of golang (#97)

diff --git a/.travis.yml b/.travis.yml
index dc10f69..3da7249 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,10 +2,13 @@ language: go
 dist: trusty
 sudo: false
 
-go:
-    - 1.8.3
-    - 1.9
-    - tip
+matrix:
+  include:
+    - go: 1.8.3
+    - go: 1.9
+    - go: tip
+  allow_failures:
+    - go: tip
 
 branches:
     only: