Add phpstan deprecation rule

Author: VincentLanglet

composer.json

@@ -27,6 +27,7 @@
         "friendsofphp/php-cs-fixer": "^3.13.0",
         "infection/infection": "^0.26.16 || ^0.32.0",
         "phpstan/phpstan": "^2.0",
+        "phpstan/phpstan-deprecation-rules": "^2.0",
         "phpstan/phpstan-phpunit": "^2.0",
         "phpstan/phpstan-strict-rules": "^2.0",
         "phpstan/phpstan-symfony": "^2.0",

phpstan.neon

@@ -4,6 +4,7 @@ includes:
     - vendor/phpstan/phpstan-symfony/extension.neon
     - vendor/phpstan/phpstan-symfony/rules.neon
     - vendor/phpstan/phpstan-webmozart-assert/extension.neon
+    - vendor/phpstan/phpstan-deprecation-rules/rules.neon
     - vendor/phpstan/phpstan-strict-rules/rules.neon
     - vendor/phpstan/phpstan/conf/bleedingEdge.neon