[doc][skip ci] Add WAMP transport to README

Author: makasim

README.md

@@ -65,6 +65,10 @@ Features:
 [![Build Status](https://travis-ci.org/php-enqueue/mongodb.png?branch=master)](https://travis-ci.org/php-enqueue/mongodb)
 [![Total Downloads](https://poser.pugx.org/enqueue/mongodb/d/total.png)](https://packagist.org/packages/enqueue/mongodb/stats)
 [![Latest Stable Version](https://poser.pugx.org/enqueue/mongodb/version.png)](https://packagist.org/packages/enqueue/mongodb)
+    * [WAMP](docs/transport/wamp.md)
+[![Build Status](https://travis-ci.org/php-enqueue/wamp.png?branch=master)](https://travis-ci.org/php-enqueue/wamp)
+[![Total Downloads](https://poser.pugx.org/enqueue/wamp/d/total.png)](https://packagist.org/packages/enqueue/wamp/stats)
+[![Latest Stable Version](https://poser.pugx.org/enqueue/wamp/version.png)](https://packagist.org/packages/enqueue/wamp)
     * [Null](docs/transport/null.md).
 [![Build Status](https://travis-ci.org/php-enqueue/null.png?branch=master)](https://travis-ci.org/php-enqueue/null)
 [![Total Downloads](https://poser.pugx.org/enqueue/null/d/total.png)](https://packagist.org/packages/enqueue/null/stats)