Directly set spawner type on place instead of using task scheduler.
Fix for 1.12.1 causing pigs due to Spigot block state changes.
Implement valid version number checking. The plugin will disable itself if the server isn't a supported version number (1.12.1), rather than a supported version string (v1_12_R1).
Downgrading your server from 1.11 to 1.10 will result in various issues including no spawners working, disappearing, etc. (upgrading should work fine though).
Config files won't migrate automatically when you upgrade the server to a new major version. This will be fixed in 3.0.
If a config value doesn't exist it will toggle between that value and all values in the config every time the plugin is reloaded. Pushed back. Will be fixed in 3.0.
