Add Chrome PHP.

README.md

 ### Scraping
 *Libraries for scraping websites.*
 
+* [Chrome PHP](https://github.com/chrome-php/chrome) - Instrument headless Chrome/Chromium instances from PHP. 
 * [DiDOM](https://github.com/Imangazaliev/DiDOM) - A super fast HTML scrapper and parser.
 * [Embed](https://github.com/oscarotero/Embed) - An information extractor from any web service or page.
 * [Goutte](https://github.com/FriendsOfPHP/Goutte) - A simple web scraper.