bumped twig extensions to version 1.2

Author: OskarStark

composer.json

@@ -17,7 +17,7 @@
     "require": {
         "symfony/symfony": ">= 2.2.0",
         "twig/twig": ">= 1.9.0",
-        "twig/extensions": "1.0.*",
+        "twig/extensions": "~1.2",
         "robloach/component-installer": ">= 0.0.11",
         "afarkas/html5shiv": "~3.7",
         "components/jquery": ">= 1.9.0, < 2.0.0",