Require Node.js 12 and move to ESM

.github/workflows/main.yml

@@ -12,11 +12,9 @@ jobs:
         node-version:
           - 14
           - 12
-          - 10
-          - 8
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.d.ts

@@ -1,10 +1,30 @@
 declare const stop: unique symbol;
 
-declare namespace pEachSeries {
-	type StopSymbol = typeof stop;
-}
+export type StopSymbol = typeof stop;
 
 declare const pEachSeries: {
+	/**
+	Stop iterating through items by returning `pEachSeries.stop` from the iterator function.
+
+	@example
+	```
+	import pEachSeries from 'p-each-series';
+
+	// Logs `a` and `b`.
+	const result = await pEachSeries(['a', 'b', 'c'], value => {
+		console.log(value);
+
+		if (value === 'b') {
+			return pEachSeries.stop;
+		}
+	});
+
+	console.log(result);
+	//=> ['a', 'b', 'c']
+	```
+	*/
+	readonly stop: StopSymbol;
+
 	/**
 	Iterate over promises serially.
 
@@ -14,7 +34,7 @@ declare const pEachSeries: {
 
 	@example
 	```
-	import pEachSeries = require('p-each-series');
+	import pEachSeries from 'p-each-series';
 
 	const keywords = [
 		getTopKeyword(), //=> Promise
@@ -24,41 +44,14 @@ declare const pEachSeries: {
 
 	const iterator = async element => saveToDiskPromise(element);
 
-	(async () => {
-		console.log(await pEachSeries(keywords, iterator));
-		//=> ['unicorn', 'rainbow', 'pony']
-	})();
+	console.log(await pEachSeries(keywords, iterator));
+	//=> ['unicorn', 'rainbow', 'pony']
 	```
 	*/
 	<ValueType>(
 		input: Iterable<PromiseLike<ValueType> | ValueType>,
-		iterator: (element: ValueType, index: number) => pEachSeries.StopSymbol | unknown
+		iterator: (element: ValueType, index: number) => StopSymbol | unknown
 	): Promise<ValueType[]>;
-
-	/**
-	Stop iterating through items by returning `pEachSeries.stop` from the iterator function.
-
-	@example
-	```
-	const pEachSeries = require('p-each-series');
-
-	// Logs `a` and `b`.
-	const result = await pEachSeries(['a', 'b', 'c'], value => {
-		console.log(value);
-
-		if (value === 'b') {
-			return pEachSeries.stop;
-		}
-	});
-
-	console.log(result);
-	//=> ['a', 'b', 'c']
-	```
-	*/
-	readonly stop: pEachSeries.StopSymbol;
-
-	// TODO: Remove this for the next major release
-	default: typeof pEachSeries;
 };
 
-export = pEachSeries;
+export default pEachSeries;

index.js

@@ -1,5 +1,3 @@
-'use strict';
-
 const pEachSeries = async (iterable, iterator) => {
 	let index = 0;
 
@@ -17,6 +15,4 @@ const pEachSeries = async (iterable, iterator) => {
 
 pEachSeries.stop = Symbol('pEachSeries.stop');
 
-module.exports = pEachSeries;
-// TODO: Remove this for the next major release
-module.exports.default = pEachSeries;
+export default pEachSeries;

index.test-d.ts

@@ -1,5 +1,5 @@
 import {expectType} from 'tsd';
-import pEachSeries = require('.');
+import pEachSeries from './index.js';
 
 const keywords = [Promise.resolve('foo'), 'rainbow', 'pony'];
 

package.json

@@ -10,8 +10,10 @@
 		"email": "[email protected]",
 		"url": "https://sindresorhus.com"
 	},
+	"type": "module",
+	"exports": "./index.js",
 	"engines": {
-		"node": ">=8"
+		"node": ">=12"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd"
@@ -39,10 +41,10 @@
 		"bluebird"
 	],
 	"devDependencies": {
-		"ava": "^1.4.1",
-		"delay": "^4.1.0",
-		"time-span": "^3.0.0",
-		"tsd": "^0.7.2",
-		"xo": "^0.24.0"
+		"ava": "^3.15.0",
+		"delay": "^5.0.0",
+		"time-span": "^4.0.0",
+		"tsd": "^0.14.0",
+		"xo": "^0.38.2"
 	}
 }

readme.md

@@ -13,7 +13,7 @@ $ npm install p-each-series
 ## Usage
 
 ```js
-const pEachSeries = require('p-each-series');
+import pEachSeries from 'p-each-series';
 
 const keywords = [
 	getTopKeyword(), //=> Promise
@@ -23,10 +23,8 @@ const keywords = [
 
 const iterator = async element => saveToDiskPromise(element);
 
-(async () => {
-	console.log(await pEachSeries(keywords, iterator));
-	//=> ['unicorn', 'rainbow', 'pony']
-})();
+console.log(await pEachSeries(keywords, iterator));
+//=> ['unicorn', 'rainbow', 'pony']
 ```
 
 ## API
@@ -52,7 +50,7 @@ Return value is ignored unless it's `Promise`, then it's awaited before continui
 Stop iterating through items by returning `pEachSeries.stop` from the iterator function.
 
 ```js
-const pEachSeries = require('p-each-series');
+import pEachSeries from 'p-each-series';
 
 // Logs `a` and `b`.
 const result = await pEachSeries(['a', 'b', 'c'], value => {

test.js

@@ -1,7 +1,7 @@
 import test from 'ava';
 import delay from 'delay';
 import timeSpan from 'time-span';
-import pEachSeries from '.';
+import pEachSeries from './index.js';
 
 const fixtureError = new Error('fixture');
 
@@ -31,7 +31,7 @@ test('main', async t => {
 });
 
 test('rejection input rejects the promise', async t => {
-	await t.throwsAsync(pEachSeries([1, Promise.reject(fixtureError)], () => {}), fixtureError.message);
+	await t.throwsAsync(pEachSeries([1, Promise.reject(fixtureError)], () => {}), {message: fixtureError.message});
 });
 
 test('handles empty iterable', async t => {