Update phpstan/phpstan requirement from ^1.0 to ^1.0 || ^2.0

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...2.0.2)

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

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

composer.json

@@ -22,7 +22,7 @@
         "ext-json": "*",
         "goetas-webservices/xsd-reader": "^0.4",
         "phpunit/phpunit": ">=7.5 <10",
-        "phpstan/phpstan": "^1.0",
+        "phpstan/phpstan": "^1.0 || ^2.0",
         "infection/infection": ">=0.16",
         "friendsofphp/php-cs-fixer": "^3.0",
         "rector/rector": ">=0.18",