Treiber-0.0.4: dependencies

Dependencies for Treiber-0.0.4

library	base (>=4.6 && <4.8) ghc-prim (>=0.3 && <0.4) monad-loops (>=0.4.2 && <0.5) ref-mtl (>=0.2.1 && <2.3) stm (>=0.2.4 && <2.5)