update tested up to

readme.txt

@@ -3,7 +3,7 @@ Contributors: eskapism, MarsApril, samface, angrycreative, Earth People
 Donate link: http://simple-fields.com/about/donate/
 Tags: admin, fields, custom fields, advanced custom fields, extended custom fields, more fields, repeatable fields, field manager, attachments, text areas, input fields, tinymce, radio button, drop down, files, meta box, edit, post, post_meta, post meta, custom, simple fields, cms, date picker, time picker, repeatable fields, multiple fields
 Requires at least: 3.7.1
-Tested up to: 3.8.2
+Tested up to: 3.9.1
 Stable tag: 1.4.6
 
 With Simple Fields you can add any kind of custom fields to your pages, posts and attachments.