Fix PHPDoc parameters

Author: ivan770

src/HttpClient.php

@@ -9,11 +9,11 @@
 use Symfony\Component\HttpClient\HttpClient as Client;
 
 /**
- * @method Response get(string $url, array $arguments) Send a GET request
- * @method Response head(string $url, array $arguments) Send a HEAD request
- * @method Response post(string $url, array $arguments) Send a POST request
- * @method Response put(string $url, array $arguments) Send a PUT request
- * @method Response delete(string $url, array $arguments) Send a DELETE request
+ * @method Response get(string $url, array $arguments = []) Send a GET request
+ * @method Response head(string $url, array $arguments = []) Send a HEAD request
+ * @method Response post(string $url, array $arguments = []) Send a POST request
+ * @method Response put(string $url, array $arguments = []) Send a PUT request
+ * @method Response delete(string $url, array $arguments = []) Send a DELETE request
  */
 class HttpClient
 {