Align code style with jsdom

There are some small departures as we use Prettier in this project.

Author: asamuzaK

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = space
+indent_size = 2

eslint.config.mjs

@@ -9,32 +9,16 @@ export default [
   {
     files: ["**/*.js"],
     languageOptions: {
-      sourceType: "commonjs"
+      sourceType: "commonjs",
+      globals: globals.node
     }
   },
   ...domenicConfig,
   prettierRecommended,
   {
     rules: {
       "consistent-return": "off",
-      "func-style": "off",
-      "prefer-destructuring": "off",
       "require-unicode-regexp": "off"
     }
-  },
-  {
-    files: ["scripts/**/*"],
-    languageOptions: {
-      globals: globals.node
-    },
-    rules: {
-      "no-console": "off"
-    }
-  },
-  {
-    files: ["test/**/*"],
-    languageOptions: {
-      globals: globals.node
-    }
   }
 ];

lib/CSSStyleDeclaration.js

@@ -13,13 +13,7 @@ const {
   prepareProperties,
   shorthandProperties
 } = require("./normalize");
-const {
-  hasVarFunc,
-  isGlobalKeyword,
-  parseCSS,
-  parsePropertyValue,
-  prepareValue
-} = require("./parsers");
+const { hasVarFunc, isGlobalKeyword, parseCSS, parsePropertyValue, prepareValue } = require("./parsers");
 const { asciiLowercase } = require("./utils/strings");
 
 /**
@@ -591,8 +585,7 @@ class CSSStyleDeclaration {
     }
     if (value && !hasVarFunc(value)) {
       const longhandValues = [];
-      const { shorthandFor, position: shorthandPosition } =
-        shorthandProperties.get(shorthandProperty);
+      const { shorthandFor, position: shorthandPosition } = shorthandProperties.get(shorthandProperty);
       for (const [longhandProperty] of shorthandFor) {
         const longhandValue = this.getPropertyValue(longhandProperty);
         const longhandPriority = this._priorities.get(longhandProperty) ?? "";