Allow Composer plugins required by Composer 2.2+

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: joehoyle

composer.json

@@ -20,6 +20,12 @@
 		"phpcompatibility/phpcompatibility-wp": "^2.0",
 		"phpunit/phpunit": "^9.6"
 	},
+	"config": {
+		"allow-plugins": {
+			"composer/installers": true,
+			"dealerdirect/phpcodesniffer-composer-installer": true
+		}
+	},
 	"scripts": {
 		"post-install-cmd": "\"vendor/bin/phpcs\" --config-set installed_paths vendor/wp-coding-standards/wpcs",
 		"post-update-cmd" : "\"vendor/bin/phpcs\" --config-set installed_paths vendor/wp-coding-standards/wpcs"