readme: mention etension installer

hrach · web-flow · commit dbe387a09f6a · 2020-02-01T20:41:43.000+01:00
diff --git a/readme.md b/readme.md
@@ -14,7 +14,7 @@ To use this extension, require it in [Composer](https://getcomposer.org/):
 composer require --dev nextras/orm-phpstan
 ```
 
-And include extension.neon in your project's PHPStan config:
+We recommend using [PHPStan auto extension installer](phpstan/extension-installer), but you may include this extension manually by including `extension.neon` in your project's PHPStan config:
 
 ```
 includes:
