Cabal revisions of silently-1.2

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

 name: silently version: 1.2+x-revision: 1 cabal-version: >= 1.8 build-type: Simple license: BSD3  Library   build-depends:-      base >=4 && <=5+      base >=4.4 && <5     , directory     , deepseq   exposed-modules: System.IO.Silently