4.0.0 core-kotlin-concurrency core-kotlin-concurrency jar com.baeldung.core-kotlin-modules core-kotlin-modules 1.0.0-SNAPSHOT org.jetbrains.kotlin kotlin-stdlib-jdk8 ${kotlin.version} org.assertj assertj-core ${assertj.version} test org.jetbrains.kotlin kotlin-test ${kotlin.version} test 1.3.30 3.10.0