doc(CONTRIBUTORS): Add Vragov Roman as a contributor (#280)

Author: lerenn

CONTRIBUTORS.md

@@ -24,6 +24,7 @@ adventure, this file is a attempt to show them the respect they earned.
 * [Sinan Ülker (@unicod3)](https://github.com/unicod3)
 * [Hafiz (@fairyhunter13)](https://github.com/fairyhunter13)
 * [Geoffrey Bauduin (@geoffreybauduin)](https://github.com/geoffreybauduin)
+* [Vragov Roman (@vragovR)](https://github.com/vragovR)
 * And maybe you ?
 
 ## I would like to join the list. How can I help the project?