tag to project version

Author: wildone

.travis.yml

@@ -26,6 +26,8 @@ script:
 before_deploy:
   - mvn help:evaluate -N -Dexpression=project.version|grep -v '\['
   - export project_version=$(mvn help:evaluate -N -Dexpression=project.version|grep -v '\[')
+  - export TRAVIS_TAG=$project_version
+  - git tag $TRAVIS_TAG
 
 ## Create release in GitHub
 deploy: