Update squizlabs/php_codesniffer requirement from ^3.7.2 to ^3.8.0

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/master/CHANGELOG.md)
- [Commits](PHPCSStandards/PHP_CodeSniffer@3.7.2...3.8.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -36,7 +36,7 @@
 		"phpstan/phpstan-strict-rules": "^1.5.2",
 		"phpunit/phpunit": "^8.5.36",
 		"saschaegerer/phpstan-typo3": "^1.1.2",
-		"squizlabs/php_codesniffer": "^3.7.2"
+		"squizlabs/php_codesniffer": "^3.8.0"
 	},
 	"conflict": {
 		"typo3/cms-composer-installers": "<1.4.6"