chore(package): update electron to version 3.0.2
chore(package): update electron to version 3.0.2

Closes #1511
webtorrent/webtorrent,webtorrent/webtorrent,joshterrill/webtorrent,jamesliu96/webtorrent,jamesliu96/webtorrent,joshterrill/webtorrent,feross/webtorrent,feross/webtorrent