Why do you ignored some http setting

    Using hyperf/guzzle as a dependency in my project. But found that I can't pass HTTP client settings. Finally, I found that because you ignored these options I passed but only keep `delay` and `timeout` in `\Hyperf\Guzzle\RingPHP\CoroutineHandler::getSettings`.
https://github.com/hyperf/guzzle/blob/cae5b639bf41db207618c09d9e227de3bf5efed8/src/RingPHP/CoroutineHandler.php#L76
    What I want is pass the HTTP proxy in to inner `Swoole\Coroutine\Http\Client` in order to use `http_proxy_host` and `http_proxy_port`.
    The only way I can do now is hard coding here with these settings. But It's not the way I want. `\Hyperf\Guzzle\RingPHP\CoroutineHandler::__invoke`
    Could you please provide some better solutions for this situation?