Changing the Tested up to value to the current Wordpress version.

git-svn-id: https://plugins.svn.wordpress.org/gravity-forms-placeholder-support-add-on/trunk@894841 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixing a typo.

git-svn-id: https://plugins.svn.wordpress.org/gravity-forms-placeholder-support-add-on/trunk@894844 b8457f37-d9ea-0310-8a92-e5e31aec5664