Update to latest Go minor versions.

Author: Diwaker Gupta

.travis.yml

@@ -2,8 +2,8 @@ language: go
 
 go:
   - 1.6.4
-  - 1.7.5
-  - 1.8
+  - 1.7.6
+  - 1.8.3
 
 install:
   - go get -u golang.org/x/oauth2