Publish event with headers on exchange with routing key

[acuderman]

I have noticed, that the extension does not allow headers to be set. Would It be possible to add an option as this would enable us to test our app as our queues rely on them?

Also is there an option to publish an event to an exchange with a routing key set, rather than directly to the queue? Looking at the options, the exchange can be defined, but not the routing key.