Cabal revisions of distributive-0.6

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

 name:          distributive category:      Data Structures version:       0.6+x-revision: 1 license:       BSD3 cabal-version: >= 1.8 license-file:  LICENSE   build-depends:     base                >= 4   && < 5,     base-orphans        >= 0.5.2 && < 1,-    transformers        >= 0.2 && < 0.6+    transformers        >= 0.3 && < 0.6    if !impl(ghc >= 7.8) && !impl(ghcjs)     build-depends: transformers-compat >= 0.3 && < 1