Error in Add/Edit subscriber documentation

[ferran-romero]

In the code provided to document Add/Edit subscriber:

`
// if you want use another adding mode, create it. It's optional too and by default "AddAndUpdate"
$mode = Mode::ADD_AND_UPDATE();

// you can add more than one subscriber to request
$addOrEditResponse = $api->subscribers()->addOrEdit([$subscriberData], $options, $mode);
`

But it seems there's only two parameters in the method:

`
/**
* Add or edit subscriber
*
* @param SubscriberInfo[] $subscriberInfos Subscribers information list
* @param Options|null $options Options
*
* @return SubscribersPostResponse Response
*/
public function addOrEdit(array $subscriberInfos, Options $options = null): SubscribersPostResponse
{
return new SubscribersPostResponse(
$this->requestSender->send(new SubscribersPostRequest($subscriberInfos, $options))
);
}

`

Please, consider to update documentation.