either-3.1: dependencies

Dependencies for either-3.1

library	base (>=4 && <5) MonadRandom (>=0.1 && <0.2) mtl (>=2.0 && <2.2) semigroupoids (>=3 && <4) semigroups (>=0.8.3.1 && <1) transformers (>=0.2 && <0.4)