New WordPress version compatibility

git-svn-id: https://plugins.svn.wordpress.org/import-users-from-csv-with-meta/trunk@981378 b8457f37-d9ea-0310-8a92-e5e31aec5664
New version

git-svn-id: https://plugins.svn.wordpress.org/import-users-from-csv-with-meta/trunk@981501 b8457f37-d9ea-0310-8a92-e5e31aec5664