Cabal revisions of scrypt-0.2.0

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 name:           scrypt version:        0.2.0+x-revision: 1 license:        BSD3 license-file:   LICENSE category:       Cryptography     exposed-modules: Crypto.Scrypt      build-depends:-        base == 4.*,+        base >= 4 && < 4.7,         bytestring == 0.9.*      ghc-options: -Wall