Release version 2.19.0

git-svn-id: https://plugins.svn.wordpress.org/testimonials-widget/trunk@888712 b8457f37-d9ea-0310-8a92-e5e31aec5664
2.19.0 updates

git-svn-id: https://plugins.svn.wordpress.org/testimonials-widget/trunk@888713 b8457f37-d9ea-0310-8a92-e5e31aec5664