Merge pull request #2048 from WordPress/fix/phpcs

Add PHPCS ruleset from Plugin Check and fix issues

Author: westonruter

composer.json

@@ -20,6 +20,23 @@
     "ext-gd": "Required to use Modern Image Format's Dominant_Color_Image_Editor_GD class",
     "ext-zlib": "Required for compression of URL Metric data submitted to the REST API for storage in Optimization Detective"
   },
+  "repositories":[
+    {
+      "type":"composer",
+      "url":"https://wpackagist.org",
+      "only": [
+        "wpackagist-plugin/*",
+        "wpackagist-theme/*"
+      ]
+    }
+  ],
+  "extra": {
+    "installer-paths": {
+      "vendor/{$vendor}/{$name}/": [
+        "wpackagist-plugin/plugin-check"
+      ]
+    }
+  },
   "require-dev": {
     "phpcompatibility/php-compatibility": "^9.3",
     "phpstan/extension-installer": "^1.3",
@@ -33,12 +50,14 @@
     "wp-phpunit/wp-phpunit": "^6.5",
     "yoast/phpunit-polyfills": "^4.0",
     "phpstan/php-8-stubs": "^0.4.0",
-    "phpstan/phpstan-strict-rules": "^1.6"
+    "phpstan/phpstan-strict-rules": "^1.6",
+    "wpackagist-plugin/plugin-check": "^1.5"
   },
   "config": {
     "allow-plugins": {
       "dealerdirect/phpcodesniffer-composer-installer": true,
-      "phpstan/extension-installer": true
+      "phpstan/extension-installer": true,
+      "composer/installers": true
     },
     "platform": {
       "php": "7.2"