Feature: Add resolveAll() method to support custom query types in Resolver. (#110 by @clue and @WyriHaximus)

$resolver->resolveAll('reactphp.org', Message::TYPE_AAAA)->then(function ($ips) {
    echo 'IPv6 addresses for reactphp.org ' . implode(', ', $ips) . PHP_EOL;
});

Feature: Support parsing NS, TXT, MX, SOA and SRV records. (#104, #105, #106, #107 and #108 by @clue)

Feature: Add support for Message::TYPE_ANY and parse unknown types as binary data. (#104 by @clue)

Feature: Improve error messages for failed queries and improve documentation. (#109 by @clue)

Feature: Add reverse DNS lookup example. (#111 by @clue)