4.0.0 future-converter-spring-rxjava net.javacrumbs.future-converter future-converter 0.1.0 org.springframework spring-core io.reactivex rxjava maven-compiler-plugin 1.7 1.7 org.codehaus.mojo animal-sniffer-maven-plugin 1.13 sniff test check org.codehaus.mojo.signature java17 1.0