Minor update

Author: Wazabii

Response.php

@@ -133,6 +133,16 @@ public function getReasonPhrase()
         return $this->phrase;
     }
 
+    /**
+     * Check is status response counts as a valid response
+     * HTTP response status codes in the 200 range generally indicate a successful or valid response.
+     * @return bool
+     */
+    public function isValidResponse(): bool
+    {
+        return ($this->statusCode >= 200 && $this->statusCode < 300);
+    }
+
     /**
      * Get modified date
      * @return int|null