Update README.md

ondrejmirtes · web-flow · commit 0bebda4e7d44 · 2020-04-16T18:18:32.000+02:00
diff --git a/README.md b/README.md
@@ -4,6 +4,8 @@
 [![Latest Stable Version](https://poser.pugx.org/phpstan/phpstan-deprecation-rules/v/stable)](https://packagist.org/packages/phpstan/phpstan-deprecation-rules)
 [![License](https://poser.pugx.org/phpstan/phpstan-deprecation-rules/license)](https://packagist.org/packages/phpstan/phpstan-deprecation-rules)
 
+* [PHPStan](https://phpstan.org/)
+
 
 ## Installation
 
