Update .travis.yml

Author: borgogelli

.travis.yml

@@ -7,12 +7,12 @@ install: true # The install step runs before script step, and with Maven you don
 script: 
   - mvn -f pom_travis.xml clean verify
 after_script:  
-  - 'echo "TRAVIS_TAG = $TRAVIS_TAG"'
-  - 'echo "GITHUB_OAUTH_TOKEN = $GITHUB_OAUTH_TOKEN"'
+  - 'echo "TRAVIS_TAG = ${TRAVIS_TAG}"'
+  - 'echo "GITHUB_OAUTH_TOKEN = ${GITHUB_OAUTH_TOKEN}"'
 deploy: # see https://docs.travis-ci.com/user/deployment/releases/ 
   provider: releases
-  api_key: $GITHUB_OAUTH_TOKEN
-  file: "target/po-test-json-validator-jar-with-dependencies.jar
+  api_key: ${GITHUB_OAUTH_TOKEN}
+  file: "target/po-test-json-validator-jar-with-dependencies.jar"
   skip_cleanup: true
   on:
     tags: true # see https://docs.travis-ci.com/user/deployment#Conditional-Releases-with-on%3A