Update composer.json

Author: 66Ton99

composer.json

@@ -33,8 +33,7 @@
     "require-dev": {
         "doctrine/orm": ">=2.2.3",
         "doctrine/doctrine-bundle": "~1.4",
-        "symfony/symfony": "3.0.*",
-        "twig/twig": "<2.0",
+        "symfony/symfony": "^3.1",
         "symfony/assetic-bundle": ">=2.5",
         "phpunit/phpunit": "3.7.*",
         "behat/mink-bundle": "dev-master",