Use the most recent go version

I was wrong that 'tip' refers to the latest release go version. Although Travis CI's document uses wording "latest version", tip seems to be the development version instead of release version. The build log shows "go version devel".
chrislusf · Aug 25, 2016 · 83e45eb · 83e45eb
1 parent 85e3511
commit 83e45eb
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/.travis.yml b/.travis.yml
@@ -6,7 +6,7 @@ os:
 
 language: go
 go:
- - 1.6
+ - 1.7
  - tip
 
 services: