Get the tags for an economic data series
@param opts [Hash] options hash of parameters @option opts [Integer] api_key 32 character alpha-numeric lowercase string @option opts [String] file_type A key or file extension that indicates the type of file to send @option opts [Integer] series_id The id for a series @option opts [String] realtime_start The start of the real-time period @option opts [String] realtime_end The end of the real-time period @option opts [String] order_by Order results by values of the specified attribute @option opts [String] sort_order Sort results is ascending or descending order for attribute values specified by order_by @return [Hashie::Mash] Hash containing the results