Update phpstan/phpstan requirement from ^1.12.4 to ^2.1.16

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@1.12.4...2.1.16)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.16
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -26,7 +26,7 @@
         "orchestra/testbench": "^8.21|^9.0|^10.0",
         "pestphp/pest": "^2.35.1|^3.0.0",
         "pestphp/pest-plugin-arch": "^2.7.0|^3.0.0",
-        "phpstan/phpstan": "^1.12.4",
+        "phpstan/phpstan": "^2.1.16",
         "spatie/ray": "^1.26"
     },
     "autoload": {