Update dependency phpstan/phpstan to v2

| datasource | package         | from    | to    |
| ---------- | --------------- | ------- | ----- |
| packagist  | phpstan/phpstan | 1.12.15 | 2.1.1 |


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

Author: renovate[bot]

composer.json

@@ -28,7 +28,7 @@
     "patchlevel/coding-standard": "^1.3.0",
     "phpbench/phpbench": "^1.2.15",
     "phpspec/prophecy-phpunit": "^2.1.0",
-    "phpstan/phpstan": "^1.10.49",
+    "phpstan/phpstan": "^2.0.0",
     "phpunit/phpunit": "^10.5.2",
     "psalm/plugin-phpunit": "^0.19.0",
     "roave/infection-static-analysis-plugin": "^1.34.0",