Update squizlabs/php_codesniffer requirement from ^3.13 to ^3.13 || ^4.0 (#55)

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@3.13.0...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

@@ -41,7 +41,7 @@
         "ext-sqlite3": "*",
         "phpstan/phpstan": "^2",
         "phpunit/phpunit": "^12",
-        "squizlabs/php_codesniffer": "^3.13"
+        "squizlabs/php_codesniffer": "^3.13 || ^4.0"
     },
     "config": {
         "sort-packages": true