ways of doing core location in the different async frameworks

combineSample.swift

// super rusty on combine 
// https://brightdigit.com/tutorials/combine-corelocation-publishers-delegates/

class CLLocationManagerPublicist: NSObject, CLLocationManagerCombineDelegate {
...
  let locationSubject = PassthroughSubject<[CLLocation], Never>()
  func locationPublisher() -> AnyPublisher<[CLLocation], Never> {
    return locationSubject.eraseToAnyPublisher()
  }
  func locationManager(_: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    locationSubject.send(locations)
  }
...
}

   func authorizationPublisher() -> AnyPublisher<CLAuthorizationStatus, Never> {
    return Just(CLLocationManager.authorizationStatus())
      .merge(with:
        authorizationSubject.compactMap { $0 }
      ).eraseToAnyPublisher()
  }