#1417: Simplify code - use forEach instead of map (because return value was ignored) - use Promise.all instead of parallel, because tasks are already Promise based. Fewer callbacks.
#1417: Simplify code
- use forEach instead of map (because return value was ignored)
- use Promise.all instead of parallel, because tasks are already Promise based. Fewer callbacks.

feross/webtorrent-app,feross/webtorrent-app,webtorrent/webtorrent-desktop,feross/webtorrent-desktop,feross/webtorrent-desktop,feross/webtorrent-desktop,webtorrent/webtorrent-desktop,feross/webtorrent-app,webtorrent/webtorrent-desktop