Warning during build

[matozoid]

[INFO] Including com.github.javaparser:javaparser-core:jar:3.15.21 in the shaded jar.
[WARNING] javaparser-core-3.15.21.jar, javaparser-maven-sample-1.0-SNAPSHOT.jar define 1 overlapping resources: 
[WARNING]   - META-INF/MANIFEST.MF
[WARNING] maven-shade-plugin has detected that some class files are
[WARNING] present in two or more JARs. When this happens, only one
[WARNING] single version of the class is copied to the uber jar.
[WARNING] Usually this is not harmful and you can skip these warnings,
[WARNING] otherwise try to manually exclude artifacts based on
[WARNING] mvn dependency:tree -Ddetail=true and the above output.
[WARNING] See http://maven.apache.org/plugins/maven-shade-plugin/
[INFO] Attaching shaded artifact.

This is probably because of an upgraded dependency? Be sure to manually test these projects after upgrading, because they have no tests.