Build fails on JDK 15 due to maven bundle plugin error

[prashantbhat]

Using JDK 15, the project build command mvn clean install fails with the following error:

[INFO] --- maven-bundle-plugin:4.2.0:manifest (bundle-manifest) @ openpdf ---
[ERROR] An internal error occurred
java.util.ConcurrentModificationException
    at java.util.TreeMap.callMappingFunctionWithCheck (TreeMap.java:742)
    at java.util.TreeMap.computeIfAbsent (TreeMap.java:596)
    at aQute.bnd.osgi.Jar.putResource (Jar.java:288)
    at aQute.bnd.osgi.Jar$1.visitFile (Jar.java:202)
    at aQute.bnd.osgi.Jar$1.visitFile (Jar.java:177)

Updating maven-bundle-plugin to it's latest release 5.1.1 is solving this issue as I tested locally.

And I notice that there are few other maven plugins that can be updated. Enabling Dependabot for this project would automatically create PRs to update external dependencies such as maven plugins, libraries.

[andreasrosdal]

pull requests welcome ☺️

[prashantbhat]

@andreasrosdal I've created PR #415 to fix this issue along with other dependency updates, please review.