Add new line at the end of the travis file

Author: Tom Baranes

.travis.yml

@@ -53,4 +53,4 @@ script:
     - swift build
 after_success:
    - bash <(curl -s https://codecov.io/bash)
-   - sleep 5 # Workaround for https://github.com/travis-ci/travis-ci/issues/4725
+   - sleep 5 # Workaround for https://github.com/travis-ci/travis-ci/issues/4725