chore(deps-dev): update squizlabs/php_codesniffer requirement

Updates the requirements on [squizlabs/php_codesniffer](https://github.com/PHPCSStandards/PHP_CodeSniffer) to permit the latest version.

Updates `squizlabs/php_codesniffer` to 3.13.4
- [Release notes](https://github.com/PHPCSStandards/PHP_CodeSniffer/releases)
- [Changelog](https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/CHANGELOG.md)
- [Commits](PHPCSStandards/PHP_CodeSniffer@3.13.2...3.13.4)

---
updated-dependencies:
- dependency-name: squizlabs/php_codesniffer
  dependency-version: 3.13.4
  dependency-type: direct:development
  dependency-group: dev-dependencies
...

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

Author: dependabot[bot]

composer.json

@@ -45,7 +45,7 @@
 	},
 	"require-dev": {
 		"jparkinson1991/phpcodesniffer-standards": "^1.4",
-		"squizlabs/php_codesniffer": "3.13.2"
+		"squizlabs/php_codesniffer": "3.13.4"
 	},
 	"config": {
 		"optimize-autoloader": true,