Welcome back, Giants!

Config has changed, so remove the old one before updating
Updated to 1.21, and the minimum version is now 1.14.
Java version requirement has been lowered to Java 11 (you most likely run it)

Basically refactored the entire plugin.
In functionality, it stays the same, but without the bugs.

Also added world blacklist.
And also removed bStats, because it was like 99% of the plugin size.