Update phpstan/phpstan requirement from ^1.11 to ^1.12

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/1.12.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.11.0...1.12.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -30,7 +30,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.62",
         "phpstan/extension-installer": "^1.4",
-        "phpstan/phpstan": "^1.11",
+        "phpstan/phpstan": "^1.12",
         "phpstan/phpstan-phpunit": "^1.4",
         "phpunit/phpunit": "^10.5",
         "spatie/ignition": "^1.15",