Fix inconsitent nullibilty of argument extractor and return value setter
Fix inconsitent nullibilty of argument extractor and return value setter

spire-inc/Bond,tonyarnold/Bond,ReactiveKit/Bond,FiRiN59/Bond,spire-inc/Bond,tonyarnold/Bond,FiRiN59/Bond,SwiftBond/Bond,SwiftBond/Bond,ReactiveKit/Bond