Update torrent-discovery Dependency

[ultimate-tester]

Currently the torrent-discovery dependency is outdated causing the following Denial of Service exploit:

High Denial of Service

Package ws

Patched in >= 1.1.5 <2.0.0 || >=3.3.1

Dependency of torrent-stream

Path torrent-stream > torrent-discovery > bittorrent-tracker >
simple-websocket > ws

More info https://nodesecurity.io/advisories/550

Please update the dependency to the latest version, this package is behind by quite some major versions..

[G-Ray]

See #190