add icann.dns to meta-TLD

added icann.dns support to the http server
returns dns response json
It's potentially dangerous to do it this way, since the format could change in the future if `native-dns` gets updated. If you need to create a new empty packet, then just create an instance of the class that already exists (i.e. in your `resolve:` method). For `oldDNSLookup:` you should just keep and use the parameter that was passed in.