Update Travis config to build/test with Go 1.11 (uber-go#670)

NWilson · akshayjshah · commit 82e3b47c1fe4 · 2019-01-22T10:45:50.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,8 @@
 language: go
 sudo: false
 go:
-  - 1.9.x
   - 1.10.x
+  - 1.11.x
 go_import_path: go.uber.org/zap
 env:
   global:
