Latest version of org.slf4j:slf4j-ext
https://javadoc.io/doc/org.slf4j/slf4j-ext
Current version 1.8.0-beta1
https://javadoc.io/doc/org.slf4j/slf4j-ext/1.8.0-beta1
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.slf4j/slf4j-ext/1.8.0-beta1/package-list