Fix mistake in Graphics/Input.js library.

libraries/Native/Graphics/Input.js

@@ -103,7 +103,7 @@ Elm.Native.Graphics.Input = function(elm) {
 		   });
      }
 
-     return { _:{}, button:F4(button), events:events };
+     return { _:{}, customButton:F4(button), events:events };
  }
 
 

server/elm-server.cabal

@@ -17,7 +17,7 @@ Category:            Compiler, Language
 Build-type:          Simple
 
 --Extra-source-files:  README.md
-Cabal-version:       >=1.6
+Cabal-version:       >=1.8
 
 source-repository head
   type:     git