Updating Getting All Tickets for a User

Using `$client->users($requesterId)->requests()->findAll();` does not work for fetching all of user's tickets, using `$client->users($requesterId)->tickets()->requested();` instead works.

README.md

@@ -57,7 +57,7 @@ $tickets = $client->tickets()->findAll();
 print_r($tickets);
 
 // Get all tickets regarding a specific user.
-$tickets = $client->users($requesterId)->requests()->findAll();
+$tickets = $client->users($requesterId)->tickets()->requested();
 print_r($tickets);
 
 // Create a new ticket