xz compression support?

I noticed that the old runtimes in https://github.com/AppImage/AppImageKit/releases supports xz format squashfs well, but when I add the same squashfs file to the runtime files provided in this repo, I received this:
```
Squashfs image uses xz compression, this version supports only zlib, zstd.
```
It seems that xz and glib and lz4 and lzo and lzma support has been removed?