Updated the tested up to version

git-svn-id: http://plugins.svn.wordpress.org/post-duplicator/trunk@835244 b8457f37-d9ea-0310-8a92-e5e31aec5664

Author: metaphorcreations

readme.txt

@@ -2,7 +2,7 @@
 Contributors: metaphorcreations
 Tags: posts, post, duplicate, duplication
 Requires at least: 3.0
-Tested up to: 3.5.1
+Tested up to: 3.8
 Stable tag: /trunk/
 License: GPL2