bugfix: this needs to match the source code

Created by: muffato

Use case

At the moment beekeeper will report that the Java wrapper has an incompatible version.

Description

The implementation is already compatible with the 4.* interface, but I forgot to change the version number in pom.xml in #110 / #111

Possible Drawbacks

None

Testing

Have you added/modified unit tests to test the changes?

No

Have you run the entire test suite and no regression was detected?

Yes