Code signing problems for macOS disk images

[brunchboy]

Notarization has stopped working again. Looking at the detailed error messages from the notarization server, the problem appears to be caused by some of the embedded native code shipped by dependencies. Specifically:

• beat-link-trigger.jar/libnrepl-macos-universal.so
• beat-link-trigger.jar/META-INF/native/libnetty_transport_native_kqueue_x86_64.jnilib (whoa, weird path!)
• beat-link-trigger.jar/uk/co/xfactorylibrarians/coremidi4j/libCoreMidi4J.dylib
• beat-link-trigger.jar/com/sun/jna/darwin/libjnidispatch.jnilib

So investigate whether we can add a step to explode the jar, sign those files ourselves, reassemble the jar, and proceed.