copy-maven-plugin not compatible with Maven 3.3.9

[kfriedberger]

Executing 'mvn package' fails (on Ubuntu 16.04), because the copy-Plugin can not be loaded.

[INFO] --- copy-maven-plugin:0.2.5:copy (create-artifact) @ jsylvan-full ---
[WARNING] Error injecting: com.github.goldin.plugins.copy.CopyMojo
java.lang.NoClassDefFoundError: Lorg/sonatype/aether/RepositorySystem;
[...]
[INFO] BUILD FAILURE

It seems that the copy-Plugin is no longer maintained and was not updated foe Maven 3.3.? .
Is the copy-plugin really needed? Otherwise it could be removed.

[mucst]

Indeed, it seems to be no longer maintained.
You might want to have a look at this plugin, which can be a replacement: https://maven.apache.org/plugins/maven-resources-plugin/examples/copy-resources.html