skywalking-application-toolkit com.a.eye 2.3-2017 4.0.0 skywalking-toolkit-log4j-2.x org.apache.logging.log4j log4j-core 2.7 provided org.apache.maven.plugins maven-source-plugin attach-sources jar 2.4 bintray-wu-sheng-sky-walking-repository wu-sheng-sky-walking-repository https://api.bintray.com/maven/wu-sheng/skywalking/com.a.eye.skywalking-toolkit-log4j-2.x/;publish=1