Update wearerequired/coding-standards requirement from ^3.0 (#230)

Updates the requirements on [wearerequired/coding-standards](https://github.com/wearerequired/coding-standards) to permit the latest version.
- [Release notes](https://github.com/wearerequired/coding-standards/releases)
- [Changelog](https://github.com/wearerequired/coding-standards/blob/master/CHANGELOG.md)
- [Commits](wearerequired/coding-standards@2.0.0...3.0.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -45,7 +45,7 @@
     "php-stubs/wp-cli-stubs": "^2.4",
     "phpunit/phpunit": "^7.5.20",
     "szepeviktor/phpstan-wordpress": "^1.1",
-    "wearerequired/coding-standards": "^2.0",
+    "wearerequired/coding-standards": "^3.0",
     "wp-cli/extension-command": "^2.0",
     "wp-cli/rewrite-command": "^2.0",
     "wp-cli/wp-cli-tests": "^3.0.11",