Update phpstan/phpstan requirement from ^1.10 to ^1.10 || ^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/2.1.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.0...2.1.17)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.17
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -25,7 +25,7 @@
         "ergebnis/composer-normalize": "^2.42",
         "friendsofphp/php-cs-fixer": "^3.8",
         "php-parallel-lint/php-parallel-lint": "^1.2",
-        "phpstan/phpstan": "^1.10",
+        "phpstan/phpstan": "^1.10 || ^2.0",
         "phpunit/phpunit": "^10.5.46",
         "psy/psysh": "^0.12.8",
         "roave/security-advisories": "dev-latest"