travis: go1.6beta1 -> go1.6beta2

kortschak · kortschak · commit 729652dbb661 · 2016-01-15T11:05:29.000+10:30
diff --git a/.travis.yml b/.travis.yml
@@ -17,7 +17,7 @@ go:
  - 1.3.3
  - 1.4.2
  - 1.5.2
- - 1.6beta1
+ - 1.6beta2
 
 # Required for coverage.
 before_install:
