Update configuration for ESM (#133)

We are moving to ESM on the `stylelint/stylelint` repo:
stylelint/stylelint#5291

.eslintrc.js

@@ -1,18 +1,19 @@
 "use strict";
 
+// eslint-disable-next-line no-undef -- Keep backward compatibility with CommonJS.
 module.exports = {
   parserOptions: {
     ecmaVersion: 2019,
+    sourceType: "module",
   },
   env: {
     es6: true,
     node: true,
   },
-  plugins: ["eslint-comments", "jest", "node", "sort-requires"],
   extends: [
     "eslint:recommended",
     "plugin:eslint-comments/recommended",
-    "plugin:node/recommended",
+    "plugin:node/recommended-module",
     "plugin:jest/recommended",
     "plugin:jest/style",
     "prettier",
@@ -111,7 +112,6 @@ module.exports = {
     "prefer-rest-params": "error",
     "prefer-spread": "error",
     "prefer-template": "error",
-    "sort-requires/sort-requires": "error",
-    strict: ["error", "global"],
+    "sort-imports": ["error", { allowSeparatedGroups: true }],
   },
 };

__tests__/index.test.js

@@ -1,6 +1,7 @@
 "use strict";
 
-const config = require("../");
+// eslint-disable-next-line no-undef -- Keep backward compatibility with CommonJS.
+const config = require("../index");
 
 it("test basic properties of config", () => {
   expect(isObject(config.parserOptions)).toBeTruthy();
@@ -9,6 +10,7 @@ it("test basic properties of config", () => {
 });
 
 it("load config in ESLint to validate all rule syntax is correct", () => {
+  // eslint-disable-next-line no-undef -- Keep backward compatibility with CommonJS.
   const CLIEngine = require("eslint").CLIEngine;
 
   const cli = new CLIEngine({

index.js

@@ -1,3 +1,4 @@
 "use strict";
 
+// eslint-disable-next-line no-undef -- Keep backward compatibility with CommonJS.
 module.exports = require("./.eslintrc.js");

package.json

@@ -28,8 +28,7 @@
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-eslint-comments": "^3.2.0",
     "eslint-plugin-jest": "^24.3.6",
-    "eslint-plugin-node": "^11.1.0",
-    "eslint-plugin-sort-requires": "^2.1.0"
+    "eslint-plugin-node": "^11.1.0"
   },
   "publishConfig": {
     "access": "public"