[PHP]: Update phpstan/phpstan requirement from 1.11.2 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@1.11.2...1.11.3)

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

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

composer.json

@@ -32,7 +32,7 @@
     "require-dev": {
         "ext-ast": "*",
         "bamarni/composer-bin-plugin": "^1.4",
-        "phpstan/phpstan": "1.11.2",
+        "phpstan/phpstan": "1.11.3",
         "phpstan/phpstan-doctrine": "1.4.1",
         "phpstan/phpstan-phpunit": "1.4.0",
         "phpstan/phpstan-symfony": "1.4.3",