4.0.0 ru.otus spring-20-rxjava 1.0-SNAPSHOT org.springframework.boot spring-boot-starter-parent 3.0.2 17 17 io.reactivex.rxjava2 rxjava 2.2.21 ch.qos.logback logback-classic 1.4.6 backport-util-concurrent backport-util-concurrent 3.1 compile