Cabal revisions of shelly-1.8.0

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

 Name:       shelly  Version:     1.8.0+x-revision: 1 Synopsis:    shell-like (systems) programming in Haskell  Description: Shelly provides convenient systems programming in Haskell,   Exposed-modules: Shelly, Shelly.Lifted, Shelly.Pipe, Shelly.Unix   other-modules:   Shelly.Base, Shelly.Find   hs-source-dirs: src+  other-extensions: InstanceSigs    Build-depends:     containers                >= 0.4.2.0,