Log Message:
textproc/xt-rs: update to 0.18.3

v0.18.3 (2023-12-24)
Fixed
 - Potential undefined behavior in YAML handling. This version of xt upgrades
   to the latest version of the third-party unsafe-libyaml library, which plays
   a critical role in xt's YAML support. The upgrade fixes a memory safety bug
   on 32-bit platforms, which may have caused crashes, incorrect behavior, etc.
   64-bit platforms are not affected.