records each_method should be each or find_each

lib/tallty_import_export/export.rb

@@ -37,7 +37,8 @@ module TalltyImportExport
 
           sheet.add_row @headers.map{|header| header[:name]}, style: title2, height: 39
 
-          records.find_each do |record|
+          each_method = records.is_a?(Array) ? :each : :find_each
+          records.send(each_method) do |record|
             row = []
             headers.each{ |header| row.push(handle_data(record, header)) }
             sheet.add_row row, style: title3, height: @row_height, types: @headers.map{|header| header[:format]}