Support ULMO (LZMA) and ULFO (LZFSE) compression #128
Description
There are some more modern compression formats supported:
- ULFO - LZFSE/LZVN-compressed, read-only; extension I<.dmg>;
create and use on 10.11 ("El Capitan") and later only - ULMO - LZMA-compressed, read-only; extension I<.dmg>;
create and use on 10.15 ("Catalina") and later only