Issue 5689 - Add rules for CSS declaration order to stylelint-config-eyeo

stylelint-config-eyeo/index.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 "use strict";
 
 module.exports = {
   extends: "stylelint-config-recommended",
+  plugins: [
+    "stylelint-order"
+  ],
   rules: {
     // Opening braces go on their own line
     "block-opening-brace-newline-before": "always-multi-line",
     "block-opening-brace-newline-after": "always-multi-line",
     "block-closing-brace-newline-before": "always-multi-line",
     "block-closing-brace-newline-after": "always",
     "block-closing-brace-empty-line-before": "never",
 
     // Use a space between the last selector and the declaration block
     "block-opening-brace-space-before": "always-single-line",
@@ skipping 26 matching lines @@
 
     // Two spaces per logic level
     "indentation": 2,
 
     // Line length should be 80 characters or less
     "max-line-length": 80,
 
     // Avoid qualifying ID and class names with type selectors
     "selector-no-qualifying-type": [true, {
       "ignore": ["attribute"]
-    }]
+    }],
+
+    // CSS rule declaration order should follow the WordPress CSS
+    // Coding Standards
+    "order/properties-order": require("./css-properties-order")
   }
 };