Fixed receiving Voip push in background mode for iOS 13+.

Author: cloudwebrtc

ios/Classes/CallKeep.m

@@ -220,15 +220,16 @@ - (NSString *)createUUID {
     return [uuidStr lowercaseString];
 }
 
-- (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(NSString *)type {
+
+- (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(PKPushType)type withCompletionHandler:(nonnull void (^)(void))completion {
     // Process the received push
     NSLog(@"didReceiveIncomingPushWithPayload payload = %@", payload.type);
     /* payload example.
     {
         "uuid": "xxxxx-xxxxx-xxxxx-xxxxx",
         "caller_id": "+8618612345678",
         "caller_name": "hello",
-        "caller_id_type": "number", 
+        "caller_id_type": "number",
         "has_video": false,
     }
     */
@@ -237,6 +238,9 @@ - (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayloa
 
     if (dic[@"aps"] != nil) {
         NSLog(@"Do not use the 'alert' format for push type %@.", payload.type);
+        if(completion != nil) {
+            completion();
+        }
         return;
     }
 
@@ -260,7 +264,13 @@ - (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayloa
                 localizedCallerName:callerName
                         fromPushKit:YES
                             payload:dic
-              withCompletionHandler:^(){}];
+              withCompletionHandler:completion];
+}
+
+- (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(NSString *)type {
+    [self pushRegistry:registry didReceiveIncomingPushWithPayload:payload forType:type withCompletionHandler:^(){
+        NSLog(@"[CallKeep] received");
+    }];
 }