Update dependency phpstan/phpstan to v2

| datasource | package         | from    | to    |
| ---------- | --------------- | ------- | ----- |
| packagist  | phpstan/phpstan | 1.10.25 | 2.1.1 |


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

composer.json

@@ -32,7 +32,7 @@
     "require-dev": {
         "laminas/laminas-coding-standard": "^2.5.0",
         "phpunit/phpunit": "10.2.6",
-        "phpstan/phpstan": "1.10.25",
+        "phpstan/phpstan": "2.1.1",
         "laminas/laminas-test": "^4.8",
         "phpstan/extension-installer": "^1.2",
         "slam/phpstan-laminas-framework": "^1.4"