Update symfony/dependency-injection 3.0

Author: bruli

composer.json

@@ -30,7 +30,7 @@
         "mybuilder/phpunit-accelerator": "^1.1",
         "squizlabs/php_codesniffer": "~2.3",
         "phpmd/phpmd": "~2.2",
-        "symfony/dependency-injection": "~2.7",
+        "symfony/dependency-injection": "~3.0",
         "symfony/config": "~3.0",
         "symfony/yaml": "~3.0",
         "fiunchinho/phpunit-randomizer": "~2.0",