update tested version

git-svn-id: https://plugins.svn.wordpress.org/post-link-shortcodes/trunk@856485 b8457f37-d9ea-0310-8a92-e5e31aec5664
version 0.3.1

git-svn-id: https://plugins.svn.wordpress.org/post-link-shortcodes/trunk@856491 b8457f37-d9ea-0310-8a92-e5e31aec5664