vty-6.1: dependencies

Dependencies for vty-6.1

library	base (>=4.8 && <5) binary blaze-builder (>=0.3.3.2 && <0.5) bytestring deepseq (>=1.1 && <1.6) directory filepath microlens (<0.4.14) microlens-mtl microlens-th mtl (>=1.1.1.0 && <2.4) parsec stm text (>=0.11.3) utf8-string (>=0.3 && <1.1) vector (>=0.7) if !impl(ghc>=8.0) fail semigroups (>=0.16)