deploy when tag is pushed (#186)

Author: nicksnyder

.travis.yml

@@ -15,3 +15,11 @@ script:
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)
+
+deploy:
+- provider: script
+  skip_cleanup: true
+  script: curl -sL https://git.io/goreleaser | bash
+  on:
+    tags: true
+    condition: $TRAVIS_OS_NAME = linux