Use go 1.11.x (#34)

KS Chan · web-flow · commit 15ba2cf87900 · 2018-09-23T07:08:20.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,3 @@
 language: go
 go:
-    - 1.7.x
+    - 1.11.x

-Original file line number
+Diff line change
 language: go
 go:
 -    - 1.7.x
 +    - 1.11.x