PTR not working.

Hey,

Everything else besides the PTR is working fine.

I do get 
`Daniesy\Record\Records Object ( [data:Daniesy\Record\Records:private] => Array ( ) [index:Daniesy\Record\Records:private] => 0 )`

```php
$results = (new Digger)->getRecords('chatchup.com', 'PTR');
print_r($results);
````

However, I also tried to input the IP in the string or the domain, they both doesn't work.

