Require Node.js 14 and move to ESM

Author: sindresorhus

.github/workflows/main.yml

@@ -10,13 +10,12 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
+          - 18
+          - 16
           - 14
-          - 12
-          - 10
-          - 8
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.js

@@ -1,6 +1,4 @@
-'use strict';
-
-module.exports = value => {
+export default function isObservable(value) {
 	if (!value) {
 		return false;
 	}
@@ -16,4 +14,4 @@ module.exports = value => {
 	}
 
 	return false;
-};
+}

package.json

@@ -10,8 +10,11 @@
 		"email": "sindresorhus@gmail.com",
 		"url": "https://sindresorhus.com"
 	},
+	"type": "module",
+	"exports": "./index.js",
+	"types": "./index.d.ts",
 	"engines": {
-		"node": ">=8"
+		"node": ">=14.16"
 	},
 	"scripts": {
 		"test": "xo && ava"
@@ -28,12 +31,12 @@
 		"type"
 	],
 	"devDependencies": {
-		"ava": "^1.4.1",
+		"ava": "^4.3.0",
 		"indefinite-observable": "^1.0.1",
-		"most": "^1.7.2",
-		"rxjs": "^6.5.2",
-		"xo": "^0.24.0",
-		"xstream": "^11.0.0",
-		"zen-observable": "^0.8.14"
+		"most": "^1.9.0",
+		"rxjs": "^7.5.5",
+		"xo": "^0.49.0",
+		"xstream": "^11.14.0",
+		"zen-observable": "^0.8.15"
 	}
 }

readme.md

@@ -4,14 +4,14 @@
 
 ## Install
 
-```
-$ npm install is-observable
+```sh
+npm install is-observable
 ```
 
 ## Usage
 
 ```js
-const isObservable = require('is-observable');
+import isObservable from 'is-observable';
 
 isObservable(Observable.of(1, 2));
 //=> true

test/main.js

@@ -4,7 +4,7 @@ import {of as rxOf} from 'rxjs';
 import * as most from 'most';
 import {Stream as xstream} from 'xstream';
 import {IndefiniteObservable} from 'indefinite-observable';
-import isObservable from '..';
+import isObservable from '../index.js';
 
 test('main', t => {
 	t.true(isObservable(zenObservable.of(1)));

test/strict.js

@@ -1,12 +1,12 @@
 import test from 'ava';
-import isObservable from '..';
+import isObservable from '../index.js';
 
 const fake1 = {'@@observable': true};
 const fake2 = {undefined: true};
 const fake3 = {
 	undefined() {
 		return this;
-	}
+	},
 };
 
 test('strict', t => {