Update squizlabs/php_codesniffer requirement from ^3.9 to ^3.11

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/master/CHANGELOG.md)
- [Commits](PHPCSStandards/PHP_CodeSniffer@3.9.0...3.11.1)

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

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

composer.json

@@ -35,7 +35,7 @@
         "phpstan/phpstan": "^1.10.59",
         "phpunit/phpunit": "^9.6 || ^10",
         "psr/http-factory": "^1.0",
-        "squizlabs/php_codesniffer": "^3.9"
+        "squizlabs/php_codesniffer": "^3.11"
     },
     "autoload": {
         "psr-4": {