Update PHPStan packages to v2

Author: renovate[bot]

composer.json

@@ -9,8 +9,8 @@
     },
     "require-dev": {
         "phpstan/extension-installer": "^1.3",
-        "phpstan/phpstan": "^1.10",
-        "phpstan/phpstan-strict-rules": "^1.5"
+        "phpstan/phpstan": "^2.0",
+        "phpstan/phpstan-strict-rules": "^2.0"
     },
     "repositories": [
         {