Support react v0.3

Author: clue

composer.json

@@ -4,8 +4,8 @@
         "psr-0": {"Datagram": ""}
     },
     "require": {
-        "react/event-loop": "0.2.*",
-        "react/dns": "0.2.*",
+        "react/event-loop": ">=0.2, <0.4",
+        "react/dns": ">=0.2, <0.4",
         "react/promise": "1.*"
     }
 }