Composer(deps-dev): Update wp-coding-standards/wpcs requirement

Updates the requirements on [wp-coding-standards/wpcs](https://github.com/WordPress/WordPress-Coding-Standards) to permit the latest version.
- [Release notes](https://github.com/WordPress/WordPress-Coding-Standards/releases)
- [Changelog](https://github.com/WordPress/WordPress-Coding-Standards/blob/develop/CHANGELOG.md)
- [Commits](WordPress/WordPress-Coding-Standards@2.0.0...3.1.0)

---
updated-dependencies:
- dependency-name: wp-coding-standards/wpcs
  dependency-type: direct:development
...

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

composer.json

@@ -31,7 +31,7 @@
 		"roave/security-advisories": "dev-master",
 		"squizlabs/php_codesniffer": "^3.5.2",
 		"vimeo/psalm": "^5.13",
-		"wp-coding-standards/wpcs": "^2",
+		"wp-coding-standards/wpcs": "^3",
 		"yoast/phpunit-polyfills": "^2.0"
 	},
 	"config": {