Use with Flowable

[rossdanderson]

Hi, is there any reason that this does not cover FlowableSubscriber for Flowable use cases, or has this simply not been implemented so far?

[malafeev]

@rossdanderson it was not implemented. PR is welcome.

[rossdanderson]

Thanks, I'll try to take a look over the coming month

[malafeev]

fixed via #12