cmd: ./.ci/validation.sh versions
openjdk 21.0.10 2026-01-20 LTS
OpenJDK Runtime Environment Temurin-21.0.10+7 (build 21.0.10+7-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.10+7 (build 21.0.10+7-LTS, mixed mode, sharing)
[INFO] Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] Inspecting build with total of 1 modules
[INFO] Installing Central Publishing features
[INFO] 
[INFO] ------------------< com.puppycrawl.tools:checkstyle >-------------------
[INFO] Building checkstyle 13.4.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- clean:3.5.0:clean (default-clean) @ checkstyle ---
[INFO] 
[INFO] --- versions:2.21.0:dependency-updates-report (default-cli) @ checkstyle ---
[INFO] Rendering content with org.apache.maven.skins:maven-fluido-skin:jar:2.0.1 skin
[INFO] 
[INFO] --- versions:2.21.0:plugin-updates-report (default-cli) @ checkstyle ---
[INFO] Rendering content with org.apache.maven.skins:maven-fluido-skin:jar:2.0.1 skin
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  35.537 s
[INFO] Finished at: 2026-03-29T00:10:15Z
[INFO] ------------------------------------------------------------------------
./.ci/validation.sh: line 204: xmlstarlet: command not found