UPnP

The plugin will now load and should work on older server versions. As a result you may now see the following in your logs:

[12:02:55 WARN]: [org.bukkit.craftbukkit.v1_19_R3.legacy.CraftLegacy] Initializing Legacy Material Support. Unless you have legacy plugins and/or data this is a bug!
[12:02:57 WARN]: Legacy plugin UPnP v1.4-SNAPSHOT does not specify an api-version.

This is a result of allowing the plugin to support multiple versions in one file.