Update dependency phpstan/phpstan to v2

| datasource | package         | from    | to    |
| ---------- | --------------- | ------- | ----- |
| packagist  | phpstan/phpstan | 1.12.12 | 2.0.3 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

composer.json

@@ -35,7 +35,7 @@
     "mockery/mockery": "^1.6.12",
     "phpro/grumphp": "^2.10.0",
     "phpstan/extension-installer": "^1.4.3",
-    "phpstan/phpstan": "^1.12.12",
+    "phpstan/phpstan": "^2.0.3",
     "phpstan/phpstan-mockery": "^1.1.3",
     "phpunit/phpunit": "^11.5.1",
     "rector/rector": "^1.2.10",