delete go version 1.6.3 from travis ci and add 1.8. (#402)

cgroschupp · mholt · commit 28ead50ff1ca · 2017-06-18T11:58:28.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 language: go
 go:
-- 1.6.3
 - 1.7
+- 1.8
 - tip
 services:
   - memcached
