  * embed (not reference) YASGUI when packaged in Debian
  * cover more tests when needed crate is in Debian
    * text-diff
  * package Python bindings
    when understood how to use Python module maturin
  * check tests "test_backup" and "test_secondary"
    when they support linking against RocksDB 9.x
    <https://github.com/oxigraph/oxigraph/issues/914>
  * drop version prefix "really" when crate version reaches 0.4
    * oxrdf
    * oxsdatatypes
    * sparesults
