Update .travis.yml

Author: mikebronner

Diff for: .travis.yml

@@ -15,3 +15,11 @@ after_script:
   - php vendor/bin/coveralls
   - wget https://scrutinizer-ci.com/ocular.phar
   - php ocular.phar code-coverage:upload --format=php-clover ./build/logs/clover.xml
+
+notifications:
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/30886f28c25b1e31088f
+    on_success: change  # options: [always|never|change] default: always
+    on_failure: always  # options: [always|never|change] default: always
+    on_start: never     # options: [always|never|change] default: always