ptr-0.15.6: dependencies

Dependencies for ptr-0.15.6

library	base (>=4.8 && <5) base-prelude (>=1 && <2) bug (>=1 && <2) bytestring (>=0.10 && <0.11) contravariant (>=1.3 && <2) mtl (>=2 && <3) profunctors (>=5.1 && <6) semigroups (>=0.18 && <0.20) text (>=1 && <2) transformers (>=0.3 && <0.6)