Consider using queue interprop as abstraction for queues

[makasim]

Hello!

Please look at https://github.com/queue-interop/queue-interop project. Using interfaces from it allows us reuse some implementations like enqueue, which supports a lot of transports. You can outsource some code

[FractalizeR]

Looks great ;)

Currently I have little free time to really innovate on laravel-amqp, but I would appreciate any PR you could make.