constraints: QuickCheck ==2.7.6, aeson ==0.8.0.2, array ==0.5.0.0, attoparsec ==0.12.1.2, base ==4.7.0.1, base16-bytestring ==0.1.1.6, blaze-builder ==0.3.3.4, byteable ==0.1.1, bytestring ==0.10.4.0, case-insensitive ==1.2.0.3, charset ==0.3.7, containers ==0.5.5.1, cryptohash ==0.11.6, deepseq ==1.3.0.2, dlist ==0.7.1, ghc-prim ==0.3.1.0, hashable ==1.2.3.1, http-types ==0.8.5, integer-gmp ==0.5.1.0, mtl ==2.2.1, nats ==1, old-locale ==1.0.0.6, old-time ==1.1.0.2, parsec ==3.1.7, parsers ==0.12.1.1, pretty ==1.1.1.1, primitive ==0.5.4.0, quickcheck-instances ==0.3.10, random ==1.1, rts ==1.0, scientific ==0.3.3.7, semigroups ==0.16.0.1, syb ==0.4.4, template-haskell ==2.9.0.0, text ==1.2.0.3, tf-random ==0.5, time ==1.4.2, transformers ==0.4.2.0, unordered-containers ==0.2.5.1, vector ==0.10.12.2