• 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). 

Known Issues

• Be sure to read the changelog for Spawner v2.8 if upgrading from an earlier version than Spawner 2.8.
• 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.
• For additional issues please check here: https://github.com/ty2u/spawner/issues