Add link to https://github.com/timeweb/phpstan-enum

Author: mnapoli

README.md

@@ -123,4 +123,5 @@ class Action extends Enum
 ## Related projects
 
 - [Doctrine enum mapping](https://github.com/acelaya/doctrine-enum-type)
-- [Symfony 2/3 ParamConverter integration](https://github.com/Ex3v/MyCLabsEnumParamConverter)
+- [Symfony ParamConverter integration](https://github.com/Ex3v/MyCLabsEnumParamConverter)
+- [PHPStan integration](https://github.com/timeweb/phpstan-enum)