Uberjar multi-release support

[lsevero]

Is it possible to set the multi-release attribute to true when creating uberjars?
uberdeps Appears to have this feature but I did not find anything related on lein.

I'm having some warnings with Log4j2 related to multi-release jars:
https://issues.apache.org/jira/browse/LOG4J2-2537
https://stackoverflow.com/questions/53049346/is-log4j2-compatible-with-java-11
https://openjdk.java.net/jeps/238

[technomancy]

Happy to take a patch for this.