Feature: Update DNS dependency to support loading system default DNS nameserver config on all supported platforms (/etc/resolv.conf on Unix/Linux/Mac/Docker/WSL and WMIC on Windows) (#152 by @clue)

This means that connecting to hosts that are managed by a local DNS server, such as a corporate DNS server or when using Docker containers, will now work as expected across all platforms with no changes required:

$connector = new Connector($loop);
$connector->connect('intranet.example:80')->then(function ($connection) {
    // …
});