doc: add lxe as collaborator

PR-URL: https://github.com/iojs/io.js/pull/745
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

README.md

@@ -275,6 +275,7 @@ information about the governance of the io.js project, see
 * **Vladimir Kurchatkin** ([@vkurchatkin](https://github.com/vkurchatkin)) <vladimir.kurchatkin@gmail.com>
 * **Nikolai Vavilov** ([@seishun](https://github.com/seishun)) <vvnicholas@gmail.com>
 * **Nicu Micleușanu** ([@micnic](https://github.com/micnic)) <micnic90@gmail.com>
+* **Aleksey Smolenchuk** ([@lxe](https://github.com/lxe)) <lxe@lxe.co>
 
 Collaborators follow the [COLLABORATOR_GUIDE.md](./COLLABORATOR_GUIDE.md) in
 maintaining the io.js project.