Module org.junitpioneer

JUnit Pioneer provides extensions for JUnit 5 and its Jupiter API.

Pioneer does not limit itself to proven ideas with wide application but is purposely open to experimentation. It aims to spin off successful and cohesive portions into sibling projects or back into the JUnit 5 code base.

The dependencies on Jupiter modules could be marked as transitive but that would allow users who depend on this module to not `require` org.junit.*, which would be backwards.