This build fixes

• door signs that were broken in the latest development build
• the creation of main world signs in 1.20+.

Note that the current compatibility problems with legacy versions is mostly a thing of ItemsXL on whose forward compatibility I'll rely for the time being before a patch in the forseeable future will update it thoroughly to the new versions. This build was only tested to fix problems with Spigot 1.20.2 and might not work well with other versions.