RadiusY bug with spawners

Summary

With MythicMobs spawners, RadiusY doesn't save, causing bugs with spawners

Steps to reproduce

Either trying to set the "RadiusY" value in the config or in-game. It works until restart and it reset to default of 0.

Current behavior

When 'RadiusY: 0', then any spawner with a Radius higher than 0 has a bug where mobs will spawn floating and in the case of having blocks nearby, will spawn in walls. When no RadiusY set, the radius is used but mobs no longer check to see if they can safely spawn before doing so so they can spawn floating or simply suffocate inside a wall. When The Y is set, mobs spawn as they should but every time the server restarts, the Y is set back to 0.

Intended correct behavior

Plugin needs to stop resetting RadiusY to 0 and maintain what is set by the user in both in-game instances and in the config.

Proposed fixes

Make the plugin save the RadiusY value.