Feature request: provide a Tokio-based executor implementation.

[Kimhlo]

It would be great if someone could provide an executor implementation based on Tokio.

[azerupi]

Hi @Kimhlo! There is actually work ongoing to do just that: #653

But it is a lot of work and time is a scarce resource for me and the maintainers. If you are interested in helping out in the effort, we could definitely use more eyes on that work. Helping reviewing, testing, provide feedback, flag issues or missing functionality could all help move this work forward.