Deps: Update dependency phpstan/phpstan to v2

Author: renovate[bot]

composer.json

@@ -25,7 +25,7 @@
     "ergebnis/composer-normalize": "^2.45",
     "mockery/mockery": "^1.5",
     "phpstan/extension-installer": "^1.1",
-    "phpstan/phpstan": "^1.2",
+    "phpstan/phpstan": "^2.0",
     "phpstan/phpstan-mockery": "^1.0",
     "phpstan/phpstan-symfony": "^1.0",
     "phpunit/phpunit": "^9",