replace mdns dependency with pure JS implementation

[amilajack]

Options:

• https://github.com/mdns-js/node-mdns-js
• https://www.npmjs.com/package/bonjour
• https://www.npmjs.com/package/multicast-dns
• https://github.com/futomi/node-dns-sd

We need something that implements mdns, zeroconf, and bonjour