Use universal method

Sources/Kingfisher/ImageView+Kingfisher.swift

@@ -217,7 +217,7 @@ extension ImageView {
                     sSelf.kf_setImageTask(nil)
                     
                     guard let image = image else {
-                        indicator?.stopAnimating()
+                        indicator?.kf_stopAnimating()
                         completionHandler?(image: nil, error: error, cacheType: cacheType, imageURL: imageURL)
                         return
                     }