Needed make a update in guzzle dependencies

[gmarkiin]

The project requiries a old version of guzzle-http.
The old version of guzzle, expected recieve a QueryString when use the construct of Url.php but in actual use of IoServer::Factory, the PHP brokes because the class expected QueryString and recieve a string.

To replicate the error, just do a instance of IoServer::factory,i believe just the use in documentation example, can give the same error how as I received

[gmarkiin]

I can do the upgrade but probably takes a time.

[gklasen]

Is there a hotfix to resolve this?