Update wp-coding-standards/wpcs requirement from ^0.14.1 to ^2.3.0

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](https://github.com/WordPress/WordPress-Coding-Standards/compare/0.14.1...2.3.0)

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

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

composer.json

@@ -10,7 +10,7 @@
         "phpunit/phpunit": "^5.5",
         "phpcompatibility/php-compatibility": "*",
         "squizlabs/php_codesniffer": "3.*",
-        "wp-coding-standards/wpcs": "^0.14.1"
+        "wp-coding-standards/wpcs": "^2.3.0"
     },
     "license": "MIT",
     "authors": [