Improve forwards compatibility with all supported versions

Author: clue

composer.json

@@ -6,8 +6,8 @@
     "require": {
         "php": ">=5.3.3",
         "guzzle/parser": "~2.8|~3.0",
-        "react/socket-client": "0.3.*",
-        "react/dns": "0.3.*"
+        "react/socket-client": "^0.5 || ^0.4 || ^0.3",
+        "react/dns": "^0.4 || ^0.3"
     },
     "autoload": {
         "psr-0": { "React\\HttpClient": "" }