Update squizlabs/php_codesniffer requirement from ^3.11 to ^3.11 || ^4.0 (#59)

Updates the requirements on [squizlabs/php_codesniffer](https://github.com/PHPCSStandards/PHP_CodeSniffer) to permit the latest version.
- [Release notes](https://github.com/PHPCSStandards/PHP_CodeSniffer/releases)
- [Changelog](https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/4.x/CHANGELOG-4.x.md)
- [Commits](PHPCSStandards/PHP_CodeSniffer@3.11.0...4.0.0)

---
updated-dependencies:
- dependency-name: squizlabs/php_codesniffer
  dependency-version: 4.0.0
  dependency-type: direct:development
...

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Author: dependabot[bot]

composer.json

@@ -39,7 +39,7 @@
         "phpstan/phpstan-phpunit": "^1.4",
         "phpunit/phpunit": "^10.5",
         "slevomat/coding-standard": "^8.15",
-        "squizlabs/php_codesniffer": "^3.11"
+        "squizlabs/php_codesniffer": "^3.11 || ^4.0"
     },
     "config": {
         "sort-packages": true,