Add docs for isWebWorker and isJsDom

Author: flexdinesh

README.md

@@ -4,7 +4,6 @@
 [![npm version](https://badge.fury.io/js/browser-or-node.svg)](https://www.npmjs.com/package/browser-or-node)
 [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
 
-
 Check whether the code is running in the browser or node.js runtime.
 
 ## Install
@@ -16,8 +15,9 @@ $ npm install --save browser-or-node
 ## Usage
 
 ES6 style import
+
 ```js
-import { isBrowser, isNode } from 'browser-or-node';
+import { isBrowser, isNode, isWebWorker, isJsDom } from "browser-or-node";
 
 if (isBrowser) {
   // do browser only stuff
@@ -27,10 +27,19 @@ if (isNode) {
   // do node.js only stuff
 }
 
+if (isWebWorker) {
+  // do web worker only stuff
+}
+
+if (isJsDom) {
+  // do jsdom only stuff
+}
 ```
+
 ES5 style import
+
 ```js
-var jsEnv = require('browser-or-node');
+var jsEnv = require("browser-or-node");
 
 if (jsEnv.isBrowser) {
   // do browser only stuff
@@ -40,6 +49,13 @@ if (jsEnv.isNode) {
   // do node.js only stuff
 }
 
+if (jsEnv.isWebWorker) {
+  // do web worker only stuff
+}
+
+if (jsEnv.isJsDom) {
+  // do jsdom only stuff
+}
 ```
 
 ## License