Test on both Linux and OSX
diff --git a/.travis.yml b/.travis.yml
index eeefefa..b52758e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,10 @@
   - 1.6.2

   - tip

 

+os:

+  - linux

+  - osx

+

 matrix:

   allow_failures:

     - go: tip