interface Deno.CaaRecord
If Deno.resolveDns is called with "CAA" record type
specified, it will resolve with an array of objects with this interface.
Properties #
If true, indicates that the corresponding property tag must be
understood if the semantics of the CAA record are to be correctly
interpreted by an issuer.
Issuers must not issue certificates for a domain if the relevant CAA
Resource Record set contains unknown property tags that have critical
set.