Fix range generation... need a better solution to reverse map filter to url.

Author: dtee

lib/restpack_serializer/options.rb

@@ -77,6 +77,7 @@ def map_filter_ids(key,value)
       case value
       when Hash
         value.map { |k,v| map_filter_ids(k,v) }
+      when Range
       else
          "#{key}=#{value.join(',')}"
       end