Log Message:
textproc/xt-rs: update to 0.19.4

Fixed

    - Crashes on certain invalid YAML inputs. Previous versions of xt may have \ 
aborted with a Rust panic message
    when handling a YAML document consisting solely of an alias to an undefined \ 
anchor (e.g. *anchor).
    This bug was discovered through automated fuzzing; with the fix applied, xt \ 
now survives far longer fuzzing
    runs without further crashes.