Hi,
the Maven PDF Plugin has been retired and is no longer maintained.
We retired it, because there was very little interest by and interaction
with users over the past years.
The retirement vote results can be seen here:
https://lists.apache.org/thread/40vyzk0mv2945vs73fot0r21rf6fkk6s
If you would like to continue the development of the plugin, you can
fork the plugin using another groupId and artifactId.
You also need to rename the plugin, for example from "maven-pdf-plugin"
to "pdf-maven-plugin".
Feel free to inform others that you continue working on the plugin in a
different place.
You can write a mail to the users mailing list for that.
-The Apache Maven team
