Fixed dependencies for 2.1 branch

composer.json

@@ -17,14 +17,14 @@
         }
     ],
     "require": {
-        "symfony/http-foundation": ">=2.1,<2.3-dev",
-        "symfony/form": ">=2.1,<2.3-dev",
-        "symfony/validator": ">=2.1,<2.3-dev",
-        "symfony/security-bundle": ">=2.1,<2.3-dev",
-        "symfony/routing": ">=2.1,<2.3-dev",
-        "symfony/config": ">=2.1,<2.3-dev",
-        "symfony/console": ">=2.1,<2.3-dev",
-        "symfony/twig-bridge": ">=2.1,<2.3-dev",
+        "symfony/http-foundation": "2.1.*",
+        "symfony/form": "2.1.*",
+        "symfony/validator": "2.1.*",
+        "symfony/security-bundle": "2.1.*",
+        "symfony/routing": "2.1.*",
+        "symfony/config": "2.1.*",
+        "symfony/console": "2.1.*",
+        "symfony/twig-bridge": "2.1.*",
         "twig/twig": ">=1.10,<2.0-dev",
         "knplabs/knp-menu-bundle": ">=1.1.0,<2.0.x-dev",
         "sonata-project/jquery-bundle": "1.8.*",