4.0.0 org.baeldung reactor-core 0.0.1-SNAPSHOT reactor-core com.baeldung parent-modules 1.0.0-SNAPSHOT io.projectreactor reactor-core ${reactor-core.version} org.assertj assertj-core ${assertj.version} test io.projectreactor reactor-test ${reactor-core.version} test 3.1.3.RELEASE 3.6.1