Update phpstan/phpstan requirement from ^1.4.8 to ^2.1.17

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@1.4.8...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

@@ -34,7 +34,7 @@
         "guzzlehttp/guzzle": "^7.0",
         "jdorn/sql-formatter": "^1.2",
         "friendsofphp/php-cs-fixer": "^3.0",
-        "phpstan/phpstan": "^1.4.8"
+        "phpstan/phpstan": "^2.1.17"
     },
     "autoload": {
         "psr-4": {