Merge pull request #13 from artemeon/fix/null-response-backport

Fixed null response in ResponseException.php

src/Exception/Request/Http/ResponseException.php

@@ -44,7 +44,7 @@ public static function fromResponse(
         $instance = new static($message, 0, $previous);
         $instance->request = $request;
         $instance->response = $response;
-        $instance->statusCode = $response->getStatusCode();
+        $instance->statusCode = ($response instanceof Response) ? $response->getStatusCode() : 0;
 
         return $instance;
     }