Support metadata when dependency is any other dependency type than jar

[AlbGarciam]

The plugin is currently limiting the metadata generation to the scenario where the artifact is a jar. However maven can support different types that support licensing such as zip

[hboutemy]

can you provide a concrete example, please?

[AlbGarciam]

@hboutemy We're currently using internal assets so I'm not able to share it with you. But, according to the official doc (https://maven.apache.org/pom.html#licenses), there's no limitation based on the type to declare the license inside of pom.xml.

[hboutemy]

we'll need a test showing the change on test project (and avoid regression in the future)

[AlbGarciam]

@hboutemy I've got one public dependency with zip packaging and license
https://central.sonatype.com/artifact/com.ibm.websphere.appserver.features/wlp-nd-license

I don't really know how to add the test and the structure as I'm trying to create a pom within assets but as soon as I add zip it starts failing the install

Do you have any guide on how to contribute to the tests?

[hboutemy]

researching when/why this "limit to jar" feature was introduced, I found that it was done as a fix to #9
so not really a wish to limit the scope, but code was at that time failing getting effective pom for some dependency type: the algorithm completely changed since that time
I'll merge this PR and add some non-jar dependencies in a few tests to see that it does not cause any failure