Adding MonoZip instances.

Author: recursion-ninja

mono-traversable-keys.cabal

@@ -24,12 +24,10 @@ library
       base                 >= 4.5     && < 5.0,
       bytestring           >= 0.9     && < 1.0,   
       containers           >= 0.3     && < 0.7,
-      free                 >= 4       && < 6.0,
       hashable             >= 1.2     && < 2.0,          
       keys                 >= 3       && < 4.0,          
       mono-traversable     >= 1       && < 2.0,          
       semigroups           >= 0.8.3.1 && < 1.0,
-      tagged               >= 0.7.3   && < 1.0,
       text                 >= 0.11    && < 2.0,
       transformers         >= 0.2     && < 1.0,
       unordered-containers >= 0.2.4   && < 1.0,