WorldEdit Hang Fix

A simple mod that prevents WorldEdit from hanging the Minecraft server when the server is stopping

It fixes https://github.com/EngineHub/WorldEdit/issues/2459. What it does:

• Shutdown WorldEdit.getInstance().getExecutorService() on dedicated server stop (or it will hang the server for maximum 60s)
• Ensure the singleton java.util.Timer object in FutureProgressListener runs on a daemon thread (or it will hang the server forever)

Supported environment

| Platform | Minecraft | WorldEdit |
|———-|————–|———–|
| fabric | MC >= 1.14 | >=7.0.0 |
| forge | MC >= 1.15 | >=7.0.0 |
| neoforge | MC >= 1.20.6 | >=7.0.0 |