[Feature Request] Include CAA records in listings

[wiene]

Feature Request

It would be nice to also include CAA records in listings if they are available for a queried domain and to add this record type to the supported types for the -t parameter.

Expected behaviour

An example output could look like this:

$ dnsrecon -d example.org
[*] std: Performing General Enumeration against: example.org...
[...]
[*]      CAA 0 issue "letsencrypt.org"
[*]      CAA 0 issuewild "letsencrypt.org"
[*]      CAA 0 iodef "mailto:contact@example.org"
[...]

The output of

$ dnsrecon -d example.org -t caa

should look analogously.