Currently the version of the maven-jar-plugin is not set properly, due to the fact that it's only defined in order to not use it at all.
As the project currently relies on maven 3.0.5 it's safe to require version 3.2.0 of the plugin, as it's supported.
This should be future-proof for another few years.
I integrated the change you proposed already in PR #41 along with the fix to the actual issue addressed since I noticed the warning during the build process.
Currently the version of the
maven-jar-plugin
is not set properly, due to the fact that it's only defined in order to not use it at all. As the project currently relies on maven 3.0.5 it's safe to require version3.2.0
of the plugin, as it's supported. This should be future-proof for another few years.