Update wp-coding-standards/wpcs requirement from ^0.11 to ^2.3

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@0.11.0...2.3.0)

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

composer.json

@@ -22,7 +22,7 @@
   },
   "require-dev": {
     "frozzare/wp-test-suite": "^1.0",
-    "wp-coding-standards/wpcs": "^0.13"
+    "wp-coding-standards/wpcs": "^2.3"
   },
   "scripts": {
     "post-install-cmd": "if [ -f vendor/bin/phpcs ]; then \"vendor/bin/phpcs\" --config-set installed_paths vendor/wp-coding-standards/wpcs; fi",