4.0.0 org.baeldung reactor-core 0.0.1-SNAPSHOT org.apache.maven.plugins maven-compiler-plugin 1.8 1.8 io.projectreactor reactor-core ${reactor-core.version} junit junit ${junit.version} test org.assertj assertj-core ${assertj.version} test ch.qos.logback logback-classic ${logback.version} 3.0.5.RELEASE 4.12 3.6.1 1.1.3