Agree with aitap above, IPv6 requires a query type of "AAAA". Your script has much bigger problems since it doesn't work at all. The following worked for me (Windows 7 x64 / Strawberry 5.18.1 MSWin32-x64-multi-thread):

use strict;
use warnings;
use Net::DNS;

my $res = Net::DNS::Resolver->new(debug=>0,
    igntc=>1,
    recurse=>1,
    retrans=>0,
    retry=>1
);
$res->nameservers("8.8.8.8");
my %result_set = ();
my $query = Net::DNS::Packet->new("www.google.com", "AAAA");
my $response = $res->send($query);
if ($response->header->ancount > 0) {
    foreach my $rr ($response->answer) {
        if ($rr->type eq "AAAA") {
            $result_set{$rr->address} = 1;
        }
    }
}
use Data::Dumper; print Dumper \%result_set;
[download]

Producing:

VinsWorldcom@C:\Users\VinsWorldcom\tmp> test.pl
$VAR1 = {
          '2607:f8b0:4006:803:0:0:0:1010' => 1
        };
[download]