Added TypeScript @types/udp-discovery to DefinitelyTyped/DefinitelyTyped

[scottpage]

FYI, I added TypeScript typings definition to DefinitelyTyped/DefinitelyTyped.
If my PR merges, you'll find it here, in case you want to review or change it: udp-discovery typings

For now, you can find it here: PR fork

[stdarg]

Hello!

Just got back from vacation. I'm a bit busy. I took a quick look. I'd like to include that. Could you open a pull request against my repository to make it easier for me to review the diffs and merge?

Thanks in advance for the submission.