chore(package): update webtorrent to version 0.84.0
chore(package): update webtorrent to version 0.84.0

http://greenkeeper.io/
michaelgeorgeattard/webtorrent-desktop,yciabaud/webtorrent-desktop,michaelgeorgeattard/webtorrent-desktop,feross/webtorrent-desktop,feross/webtorrent-app,michaelgeorgeattard/webtorrent-desktop,feross/webtorrent-desktop,webtorrent/webtorrent-desktop,yciabaud/webtorrent-desktop,feross/webtorrent-app,yciabaud/webtorrent-desktop,webtorrent/webtorrent-desktop,webtorrent/webtorrent-desktop,feross/webtorrent-app,feross/webtorrent-desktop