Update phpstan/phpstan requirement from ^1.11.2 to ^1.11.3 (#541)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -29,7 +29,7 @@
     "require-dev": {
         "codacy/coverage": "^1.4.3",
         "phpstan/extension-installer": "^1.3.1",
-        "phpstan/phpstan": "^1.11.2",
+        "phpstan/phpstan": "^1.11.3",
         "phpstan/phpstan-phpunit": "^1.4.0",
         "phpunit/phpunit": "^8.5.38"
     },