add url highlight library

README.md

 * [SQL Formatter](https://github.com/jdorn/sql-formatter/) - A library for formatting SQL statements.
 * [Stringy](https://github.com/voku/Stringy) - A string manipulation library with multibyte support.
 * [UA Parser](https://github.com/tobie/ua-parser/tree/master/php) - A library for parsing user agent strings.
+* [Url highlight](https://github.com/vstelmakh/url-highlight) - A library for parsing URLs from text and converting them into clickable links.
 * [URLify](https://github.com/jbroadway/urlify) - A PHP port of Django's URLify.js.
 * [UUID](https://github.com/ramsey/uuid) - A library for generating UUIDs.