fix for webtorrent 0.58
fix for webtorrent 0.58

VoR0220/instant.io,VoR0220/instant.io,feross/instant.io,TribeMedia/instant.io,bradparks/instant.io,joeldom/instant.io,joeldom/instant.io,jhiesey/instant.io,TribeMedia/instant.io,feross/instant.io,feross/instant.io,VoR0220/instant.io,TribeMedia/instant.io,joeldom/instant.io,bradparks/instant.io,bradparks/instant.io,loon3/instant.io,corona6/instant.io,loon3/instant.io,loon3/instant.io,corona6/instant.io,jhiesey/instant.io,corona6/instant.io,jhiesey/instant.io