tell travis to use the latest golang

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 2ecdf95..159b9e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: go
 go:
-  - 1.3
+  - 1.4
   
 install:
   - go get -v ./...