[FrameworkBundle] bumped min version of Routing to 2.3

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/composer.json

@@ -23,7 +23,7 @@
         "symfony/http-foundation": "~2.3,>=2.3.19",
         "symfony/http-kernel": "~2.3,>=2.3.22",
         "symfony/filesystem": "~2.3",
-        "symfony/routing": "~2.2",
+        "symfony/routing": "~2.3",
         "symfony/stopwatch": "~2.3",
         "symfony/templating": "~2.1",
         "symfony/translation": "~2.3,>=2.3.19",