golangci lint in travis

Author: David A. Eilertsen

.travis.yml

@@ -1,4 +1,8 @@
 language: go
 go: 1.13.x
 install: go install
-script: go test -v ./...
+before_script:
+    - curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.23.6
+script:
+    - golangci-lint run  
+    - go test -v -race ./...