Use PHPStan 2 (#117)

Author: janedbal

composer.json

@@ -15,13 +15,13 @@
         "doctrine/event-manager": "^2.0",
         "editorconfig-checker/editorconfig-checker": "^10.5.0",
         "ergebnis/composer-normalize": "^2.42",
-        "phpstan/phpstan": "^1.11.1",
-        "phpstan/phpstan-phpunit": "^1.4.0",
-        "phpstan/phpstan-strict-rules": "^1.6.0",
+        "phpstan/phpstan": "^2.0.1",
+        "phpstan/phpstan-phpunit": "^2.0.0",
+        "phpstan/phpstan-strict-rules": "^2.0.0",
         "phpunit/phpunit": "^10.5.11",
-        "shipmonk/composer-dependency-analyser": "^1.2.1",
-        "shipmonk/dead-code-detector": "^0.2.1",
-        "shipmonk/phpstan-rules": "^3.0.0",
+        "shipmonk/composer-dependency-analyser": "^1.7.0",
+        "shipmonk/dead-code-detector": "^0.6.0",
+        "shipmonk/phpstan-rules": "^4.0.0",
         "slevomat/coding-standard": "^8.15.0"
     },
     "autoload": {