making observer properties as optional

Author: mitulmanish

Source/Client.swift

@@ -62,7 +62,7 @@ public class Client {
 				if oldLights != newLights {
 					strongSelf.lights = newLights
 					for observer in strongSelf.observers {
-						observer.lightsDidUpdateHandler(lights)
+						observer.lightsDidUpdateHandler?(lights)
 					}
 				}
 
@@ -125,7 +125,7 @@ public class Client {
 
 		if oldLights != newLights {
 			for observer in observers {
-				observer.lightsDidUpdateHandler(newLights)
+				observer.lightsDidUpdateHandler?(newLights)
 			}
 			self.lights = newLights
 		}

Source/ClientObserver.swift

@@ -8,7 +8,7 @@ import Foundation
 class ClientObserver {
 	typealias LightsDidUpdate = (_ lights: [Light]) -> Void
 
-	let lightsDidUpdateHandler: LightsDidUpdate
+	let lightsDidUpdateHandler: LightsDidUpdate?
 
 	init(lightsDidUpdateHandler: @escaping LightsDidUpdate) {
 		self.lightsDidUpdateHandler = lightsDidUpdateHandler

Source/LightTarget.swift

@@ -74,7 +74,7 @@ public class LightTarget {
 
 	private func notifyObservers() {
 		for observer in observers {
-			observer.stateDidUpdateHandler()
+			observer.stateDidUpdateHandler?()
 		}
 	}
 

Source/LightTargetObserver.swift

@@ -8,7 +8,7 @@ import Foundation
 public class LightTargetObserver {
 	public typealias StateDidUpdate = () -> Void
 
-	let stateDidUpdateHandler: StateDidUpdate
+	let stateDidUpdateHandler: StateDidUpdate?
 
 	init(stateDidUpdateHandler: @escaping StateDidUpdate) {
 		self.stateDidUpdateHandler = stateDidUpdateHandler