[Composer] Enable Symfony 3

Author: gl3n

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=5.4",
-        "symfony/symfony": "~2.4"
+        "symfony/symfony": "~2.4|~3.0"
     },
     "require-dev": {
         "atoum/atoum":      "@stable",
@@ -21,4 +21,4 @@
         "psr-0": { "Gl3n\\HttpQueryStringFilterBundle\\": "" }
     },
     "target-dir": "Gl3n/HttpQueryStringFilterBundle"
-}
+}