ZoneSettings missing Get all Zone settings method

Hi,

I need to get all the settings for a specific zone, like this endpoint [#zone-settings-properties](https://api.cloudflare.com/#zone-settings-properties).
Which I initially search for in the ZoneSettings class, but I didn't seems to be in this class, neither in the rest of the code.

Is it really missing? Do you plan to add it ?

I was able to get the wanted result by adding this to the ZoneSettings class:

```php
public function getSettings($zoneID)
{
$return = $this->adapter->get(
'zones/' . $zoneID . '/settings/'
);
$body = json_decode($return->getBody());

if ($body->success) {
return $body->result;
}

return false;
}