Send an action from one reducer to another

[stephencelis]

Hey @smeshko!

@mbrandonw actually sketched out a resending higher-order reducer in this thread: Responding to `FooClient.Action` regardless of which view generates `Effect`s emitting them - #2 by mbrandonw

You could maybe tack that onto activeWorkoutReducer:

let activeWorkoutReducer = Reducer.combine(
  ...
)
.resending(..., to: ...)