conversion of param type Hash, and [Hash] should be built-in

[sollycatprint]

From @catmando on December 9, 2015 15:45

currently you have to define Hash._react_param_conversion(json, validate_only=nil) for the conversion to work. This should be built-in

class Hash
   def self._react_param_conversion(json, validate_only = nil)
     if validate_only
       true
     else
       Hash.new(json)
     end
   end
end

Copied from original issue: zetachang/react.rb#95

[catmando]

@zetachang - i think this is fixed