add isTimeoutErr for muxado compatibility
add isTimeoutErr for muxado compatibility

mtlynch/Sia,mharkus/Sia,NebulousLabs/Sia,mtlynch/Sia,MrStrong/Sia,ericflo/Sia,ChrisSchinnerl/Sia,mharkus/Sia,MrStrong/Sia,ericflo/Sia,NebulousLabs/Sia,ChrisSchinnerl/Sia