Fix vet command

ipfans · ipfans · commit 1ca695f46632 · 2018-02-28T14:20:33.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -13,4 +13,4 @@ before_install:
 
 script:
   - go test -v ./...
-  - go tool vet ./...
+  - go tool vet .
