travis: faster builds
travis: faster builds

nicola/webtorrent,solderzzc/webtorrent,yciabaud/webtorrent,karissa/webtorrent,ngjermundshaug/webtorrent,adriagalin/webtorrent,dan-hill/webtorrent,serafinfernandez/webtorrent,arestov/webtorrent,whitef0x0/webtorrent,jamesliu96/webtorrent,sideffect0/webtorrent,whitef0x0/webtorrent,ngjermundshaug/webtorrent,rozifus/webtorrent,serafinfernandez/webtorrent,joshterrill/webtorrent,webtorrent/webtorrent,feross/webtorrent,FabianFrancoRoldan/webtorrent,akiva/webtorrent,loon3/webtorrent,Stiveknx/webtorrent,MiracleBlue/webtorrent,beni55/webtorrent,Stiveknx/webtorrent,karissa/webtorrent,loon3/webtorrent,lucamaraschi/webtorrent,rozifus/webtorrent,webtorrent/webtorrent,akiva/webtorrent,gillesdemey/webtorrent,rom1504/webtorrent,FabianFrancoRoldan/webtorrent,dan-hill/webtorrent,adriagalin/webtorrent,ericwooley/webtorrent,madmarks/webtorrent,lucamaraschi/webtorrent,MiracleBlue/webtorrent,nicola/webtorrent,feross/webtorrent,ericwooley/webtorrent,gillesdemey/webtorrent,jamesliu96/webtorrent,madmarks/webtorrent,beni55/webtorrent,LinusU/webtorrent,sideffect0/webtorrent,joshterrill/webtorrent,LinusU/webtorrent,yciabaud/webtorrent,solderzzc/webtorrent