add merkletree to dependencies
add merkletree to dependencies

MrStrong/Sia,mnsl/Sia,NebulousLabs/Sia,ChrisSchinnerl/Sia,ChrisSchinnerl/Sia,mharkus/Sia,ericflo/Sia,rivine/rivine,kustomzone/Sia,johnathanhowell/Sia,Mingling94/Sia,MrStrong/Sia,cyrozap/Sia,mtlynch/Sia,mtlynch/Sia,NebulousLabs/Sia,mharkus/Sia,ericflo/Sia,mnsl/Sia,rivine/rivine