Update ws dependency >= 3.3.1 per https://nodesecurity.io/advisories/550
Update ws dependency >= 3.3.1 per https://nodesecurity.io/advisories/550

Fixes https://github.com/webtorrent/bittorrent-tracker/issues/235

feross/bittorrent-tracker,LinusU/bittorrent-tracker,feross/bittorrent-tracker,jhiesey/bittorrent-tracker,jhiesey/bittorrent-tracker