Fix Travis

Author: dunglas

.travis.yml

@@ -17,11 +17,11 @@ matrix:
 
 before_install:
     - if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then phpenv config-rm xdebug.ini; fi;
-    - curl -LSs https://box-project.github.io/box2/installer.php | php
+    - if [ "$TRAVIS_PHP_VERSION" = "5.6" ]; then curl -LSs https://box-project.github.io/box2/installer.php | php; fi;
 
 install:
     - composer update --no-interaction --prefer-dist
-    - php box.phar build
+    - if [ "$TRAVIS_PHP_VERSION" = "5.6" ]; then php box.phar build; fi;
 
 script:
     - phpunit
@@ -36,3 +36,4 @@ deploy:
     on:
       tags: true
       repo: api-platform/schema-generator
+      php:  '5.6'