update mc version support

README.md

@@ -3,7 +3,7 @@
 [![view on SpigotMC](https://img.shields.io/badge/view%20on-spigotmc-orange.svg)](https://www.spigotmc.org/resources/customoregen.9532/)
 
 ## Welcome to the CustomOreGen GitHub repository!
-Spigot 1.7 - 1.14.x
+Spigot 1.7 - 1.16.x
 
 A neat solution for modifying the default ore generator of minecraft. The must-have for every skyblock server!