Update squizlabs/php_codesniffer requirement from ^3.9 to ^4.0

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@3.9.0...4.0.1)

---
updated-dependencies:
- dependency-name: squizlabs/php_codesniffer
  dependency-version: 4.0.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -48,7 +48,7 @@
         "phpstan/phpstan": "^2.0",
         "phpunit/phpunit": "^9.6",
         "doctrine/instantiator": "^1.3.1",
-        "squizlabs/php_codesniffer": "^3.9"
+        "squizlabs/php_codesniffer": "^4.0"
     },
     "autoload": {
         "psr-4": {