Merge pull request #32 from noinia/develop

relaxed witherable bound to allow for witherable 0.4

Author: ali-abrar

patch.cabal

@@ -41,7 +41,7 @@ library
                , lens >= 4.7 && < 5
                , semigroupoids >= 4.0 && < 6
                , transformers >= 0.5.6.0 && < 0.6
-               , witherable >= 0.3 && < 0.4
+               , witherable >= 0.3 && < 0.5
 
   exposed-modules: Data.Functor.Misc
                  , Data.Monoid.DecidablyEmpty