Update phpstan/phpstan requirement from 1.* to 2.*

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/2.0.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.0.0...2.0.1)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -22,7 +22,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3",
-        "phpstan/phpstan": "1.*",
+        "phpstan/phpstan": "2.*",
         "phpunit/phpunit": "^11",
         "selective/test-traits": "^4",
         "squizlabs/php_codesniffer": "^3"