Update phpstan/phpstan requirement from ~1.10.3 to ~1.11.3

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/1.11.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.3...1.11.3)

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

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

composer.json

@@ -14,7 +14,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^9.0 || ^10.0 || ^11.0",
-    "phpstan/phpstan": "~1.10.3",
+    "phpstan/phpstan": "~1.11.3",
     "phpstan/extension-installer": "^1.0",
     "phpstan/phpstan-strict-rules": "^1.0"
   },