Hello Julien,

thank you for the patch review.

> This looks good from a distance, but I'm not sure you need
> maven-enforcer-plugin. Since you're using the ant-build-system, I
> don't think the plugin has a chance to run?

Good catch.  It seems that "java-argparse4j" builds fine w/o
"maven-enforcer-plugin".  I removed this dependency and added
"java-junit" instead as it is required for the tests.