.travis.yml: update stable go version to 1.5

pmezard · pmezard · commit ac475e89e25c · 2015-10-27T13:41:05.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: go
 go:
-  - 1.4
+  - 1.5
   - tip
 

-Original file line number
+Diff line change
@@ @@ -1,5 +1,5 @@ @@
 language: go
 go:
 -  - 1.4
 +  - 1.5
   - tip