Setup TravisCI for dev branch (#161)

fix #157

before merge, needs #160 to be merged

Just need enable TravisCI, who has write access for this repo

.travis.yml

@@ -0,0 +1,17 @@
+language: go
+go:
+  - 1.11.x
+  - 1.12.x
+env:
+  - GO111MODULE=on
+install:
+  - go get -v golang.org/x/lint/golint
+  - go mod tidy -v
+script:
+  - golint -set_exit_status ./...
+  - go test -race -coverprofile=coverage.txt -covermode=atomic ./...
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
+matrix:
+  allow_failures:
+    - go: tip