Update readme

readme.md

@@ -3,19 +3,31 @@
 [![Coverage Status](https://coveralls.io/repos/github/Arttse/node.is-url-relative-without-domain/badge.svg?branch=master)](https://coveralls.io/github/Arttse/node.is-url-relative-without-domain?branch=master)
 [![Known Vulnerabilities](https://snyk.io/test/github/arttse/node.is-url-relative-without-domain/badge.svg)](https://snyk.io/test/github/arttse/node.is-url-relative-without-domain)
 
-> Node.js module. Checks if an URL is relative without domain
+> Node.js module. Checks if a URL is relative without domain
 
+Version 2 requires Node.js >= 6.13.
 
 ## Install
 
-```
-$ npm install is-url-relative-without-domain --save
-```
-or
-```
+### Package `domains` included
+```sh
+# NPM
+$ npm install is-url-relative-without-domain
+
+# Yarn
 $ yarn add is-url-relative-without-domain
 ```
 
+### Without package `domains`
+```sh
+# NPM
+$ npm install is-url-relative-without-domain --no-optional
+
+# Yarn
+$ yarn add is-url-relative-without-domain --ignore-optional
+
+```
+
 
 ## Usage
 
@@ -35,6 +47,12 @@ isUrlRelativeWithoutDomain('site.com/show/must?go=on');
 //=> false
 ```
 
+By default package using optional dependency `domains`. But, if you want to using your own list of domains, you can install without optional dependencies and specify code like this:
+```js
+isUrlRelativeWithoutDomain('site.com/foo/bar', ['com', 'рф', '世界']);
+```
+In second argument you can add your own array of domains in Unicode.
+
 
 ## License