small improvements with options in open zip file

README.md

@@ -67,7 +67,7 @@ require 'pathname'
 directory = '/Users/me/Desktop/directory_to_zip' # last slash could be omitted
 zipfile_name = '/Users/me/Desktop/recursive_directory.zip'
 options = {"directories-recursively"=>true}
-Zip::File.open(archive,open_settings) do |zipfile|
+Zip::File.open(archive,Zip::File::CREATE) do |zipfile|
         files.each{
           |file_to_be_zipped|