Jar task: --module-version and --main-class options

Java 9 and later add several new options to the jar tool:

https://docs.oracle.com/en/java/javase/11/tools/jar.html

I would like to use the --module-version and --main-class options with 
Ant's Jar task, but I could not find them in the manual:

https://ant.apache.org/manual/Tasks/jar.html

I can accomplish this using exec, but it would be simpler if I could use 
those options with the jar task. Can those two options be added?

Regards,

Bruce