Passing event kwargs to guards option

[Eyvgeniy]

Add passing kwargs from event to guard

class Vehicle
  state_machine :state, initial: :parked do
    ...
    event :crash do
      transition all - [:parked, :stalled] => :stalled, if: ->(vehicle, kwargs) {kwargs[:arg] == true} # kwargs from event fire
    end
  end
end

vehicle = Vehicle.new
vehicle.crash(arg: false) # false

[joegaudet]

+1 for htis!