update travis.yml to upload tag release build

- minor change to enable race check for go test
- use GOPATH in script

.travis.yml

@@ -17,8 +17,24 @@ before_install:
   - govendor sync
 
 script:
-  - go test -v -covermode=count -coverprofile=coverage.out ./
-  - $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci -repotoken $COVERALLS_REPO_TOKEN
+  - go test -v -race -covermode=count -coverprofile=coverage.out ./
+  - "$GOPATH/bin/goveralls -coverprofile=coverage.out -service=travis-ci -repotoken $COVERALLS_REPO_TOKEN"
+
+before_deploy:
+  - cd cmd/goexec
+  - GOOS=linux GOARCH=amd64 go build -o goexec_linux_amd64
+  - GOOS=darwin GOARCH=amd64 go build -o goexec_darwin_amd64
+
+deploy:
+  skip_cleanup: true
+  provider: releases
+  api_key:
+    secure: 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
+  file:
+  - goexec_linux_amd64
+  - goexec_darwin_amd64
+  on:
+    tags: true
 
 notifications:
   slack: