update version

lib/tallty_import_export/import.rb

@@ -51,7 +51,7 @@ module TalltyImportExport
 
     def process_options options
       options = options.with_indifferent_access
-      @headers = options.delete(:headers) || []
+      @headers = options.delete(:headers)
       @primary_keys = options.delete(:primary_keys) || @headers.map { |header| header[:primary_key] ? header[:key].to_sym : nil }.compact
 
       @excel_hash = @headers.reduce({}) do |h, header|

lib/tallty_import_export/version.rb

 module TalltyImportExport
-  VERSION = "1.0.8"
+  VERSION = "1.0.9"
 end