Merge pull request #12 from SDWebImage/little_binding_api_change

Use the @Published instead of hard-written protocol implementation

SDWebImageSwiftUI/Classes/ImageManager.swift

@@ -7,22 +7,14 @@
  */
 
 import SwiftUI
-import Combine
 import SDWebImage
 
 class ImageManager : ObservableObject {
-    
-    var objectWillChange = PassthroughSubject<ImageManager, Never>()
+    @Published var image: PlatformImage?
     
     var manager = SDWebImageManager.shared
     weak var currentOperation: SDWebImageOperation? = nil
     
-    var image: PlatformImage? {
-        willSet {
-            objectWillChange.send(self)
-        }
-    }
-    
     var url: URL?
     var options: SDWebImageOptions
     var context: [SDWebImageContextOption : Any]?