Add yunomae to contributors

contributors.md

@@ -85,3 +85,4 @@ Thank you to all contributors:
 * [Piyush Pangtey](https://github.com/pangteypiyush)
 * [Alfred Agrell](https://github.com/Alcaro)
 * [Jakub Wilk](https://github.com/jwilk)
+* [Yoshihiro YUNOMAE](https://github.com/yunomae)