Updated dependencies to handle symfony 3.0

Author: norberttech

composer.json

@@ -15,10 +15,10 @@
     ],
     "require": {
         "php": ">=5.3.0",
-        "symfony/intl": "~2.3",
-        "symfony/config": "~2.3",
-        "symfony/translation": "~2.3",
-        "symfony/yaml": "~2.3",
+        "symfony/intl": "^2.3|^3.0",
+        "symfony/config": "^2.3|^3.0",
+        "symfony/translation": "^2.3|^3.0",
+        "symfony/yaml": "^2.3|^3.0",
         "thunderer/shortcode": "~0.5"
     },
     "require-dev": {