Merge pull request #595 from openset/develop

Add: env

Author: Shuo

.travis.yml

@@ -3,8 +3,11 @@ language: go
 go:
   - "1.12.x"
 
+env:
+  - GO111MODULE=on
+
 before_install:
-  - go get -t -v ./...
+  - go get -v ./...
 
 script:
   - go test -race -coverprofile=coverage.txt -covermode=atomic ./...