Can you implement 1.20.4 support?

Supporting more versions is planned but will take some time.

1.20.4 builds are available on github actions: https://github.com/Avanatiker/WorldTools/actions?query=branch%3A1.20.4++

1.20.4 support released: https://github.com/Avanatiker/WorldTools/releases/tag/1.2.0%2B1.20.1