Update README.md

Author: staabm

README.md

@@ -3,6 +3,8 @@ rexstan
 
 rexstan integrates [PHPStan](https://phpstan.org/) into REDAXO.
 
+Using static analysis it can detect problems and point out bugs.
+
 ## 💌 Support rexstan
 
 [Consider supporting the project](https://github.com/sponsors/staabm), so we can make this tool even better even faster for everyone.