Update readme.md

Author: stevenkword

readme.md

@@ -2,8 +2,8 @@
 **Contributors:** [wpengine](https://profiles.wordpress.org/wpengine), [octalmage](https://profiles.wordpress.org/octalmage), [stevenkword](https://profiles.wordpress.org/stevenkword), [Taylor4484](https://profiles.wordpress.org/Taylor4484), [pross](https://profiles.wordpress.org/pross), [jcross](https://profiles.wordpress.org/jcross)  
 **Tags:** php 7, php 5.5, php, version, compatibility, checker, wp engine, wpe, wpengine  
 **Requires at least:** 3.5  
-**Tested up to:** 4.7.2  
-**Stable tag:** 1.4.3  
+**Tested up to:** 4.9  
+**Stable tag:** 1.4.4  
 **License:** GPLv2 or later  
 **License URI:** http://www.gnu.org/licenses/gpl-2.0.html