Fix broken build (#15)

* Fix broken buiold

* fix

Author: Nyholm

composer.json

@@ -25,6 +25,7 @@
         "php-translation/translator": "^0.1",
         "php-http/curl-client": "^1.0",
         "php-http/message": "^1.0",
+        "php-http/message-factory": "^1.0.2",
         "matthiasnoback/symfony-dependency-injection-test": "^1.0",
         "symfony/symfony": "^2.3 || ^3.0",
         "guzzlehttp/psr7": "^1.3"