Fixed reading of response if it has been already read

Fixed reading of response if it has been already read by something else (like guzzle logging middleware). It happens that ->getContents() don't rewind the Stream. But __toString does.

Author: AlexeyKupershtokh

src/IntercomClient.php

@@ -181,7 +181,7 @@ public function getAuth()
     private function handleResponse(Response $response)
     {
         $stream = stream_for($response->getBody());
-        $data = json_decode($stream->getContents());
+        $data = json_decode($stream);
         return $data;
     }
 }