Require Node.js 18, Stylelint 16, and move to ESM

.github/workflows/main.yml

@@ -10,12 +10,11 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 16
-          - 14
-          - 12
+          - 20
+          - 18
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.js

@@ -1,13 +1,13 @@
-'use strict';
-
-module.exports = {
+const config = {
 	extends: 'stylelint-config-xo',
 	rules: {
 		indentation: [
 			2,
 			{
-				baseIndentLevel: 1
-			}
-		]
-	}
+				baseIndentLevel: 1,
+			},
+		],
+	},
 };
+
+export default config;

package.json

@@ -10,8 +10,11 @@
 		"email": "[email protected]",
 		"url": "https://sindresorhus.com"
 	},
+	"type": "module",
+	"exports": "./index.js",
+	"sideEffects": false,
 	"engines": {
-		"node": ">=12"
+		"node": ">=18"
 	},
 	"scripts": {
 		"test": "xo && ava"
@@ -46,14 +49,14 @@
 		"simple"
 	],
 	"dependencies": {
-		"stylelint-config-xo": "^0.21.0"
+		"stylelint-config-xo": "^1.0.0"
 	},
 	"devDependencies": {
-		"ava": "^2.4.0",
-		"stylelint": "^14.5.3",
-		"xo": "^0.33.1"
+		"ava": "^6.1.2",
+		"stylelint": "^16.4.0",
+		"xo": "^0.58.0"
 	},
 	"peerDependencies": {
-		"stylelint": ">=14"
+		"stylelint": ">=16"
 	}
 }

test/test.js

@@ -1,21 +1,21 @@
 import test from 'ava';
 import stylelint from 'stylelint';
-import config from '..';
+import config from '../index.js';
 
 const hasRule = (errors, ruleId) => errors.some(x => x.rule === ruleId);
 
 const runStylelint = async code => {
 	const {results} = await stylelint.lint({
 		code,
-		config
+		config,
 	});
 
 	for (const result of results) {
-		if (result.deprecations.length !== 0) {
+		if (result.deprecations.length > 0) {
 			throw new Error(`Deprecations:\n${result.deprecations.join('\n')}`);
 		}
 
-		if (result.invalidOptionWarnings.length !== 0) {
+		if (result.invalidOptionWarnings.length > 0) {
 			const warnings = result.invalidOptionWarnings.map(x => x.text).join('\n');
 			throw new Error(`Invalid options:\n${warnings}`);
 		}
@@ -29,8 +29,8 @@ test('main', async t => {
 		`div {
 			left: .2em;
 		}
-		`
+		`,
 	);
 
-	t.true(hasRule(results[0].warnings, 'number-leading-zero'));
+	t.true(hasRule(results[0].warnings, '@stylistic/number-leading-zero'));
 });