Only serialise the Class of the the unhandled Throwable when a Worker crashes
Only serialise the Class of the the unhandled Throwable when a Worker crashes

tonymcveigh/worker-fw,WorkerFramework/worker-framework,tonymcveigh/worker-fw,tonymcveigh/worker-fw,WorkerFramework/worker-framework,tonymcveigh/worker-fw,tonymcveigh/worker-fw