[MERGE] Merge pull request #286 from Team-WSS/fix/#285

[FIX] deprecated된 FirebaseMessaging 내부 메서드 사용으로 인한 오류 해결

Author: Kim-TaeUk

build.gradle

@@ -72,7 +72,7 @@ dependencies {
     implementation 'com.nimbusds:nimbus-jose-jwt:3.10'
 
     // FCM
-    implementation 'com.google.firebase:firebase-admin:8.1.0'
+    implementation 'com.google.firebase:firebase-admin:9.4.3'
 }
 
 tasks.named('test') {

src/main/java/org/websoso/WSSServer/notification/FCMService.java

@@ -55,7 +55,7 @@ private Message createMessage(String targetFCMToken, FCMMessageRequest fcmMessag
     public void sendMulticastPushMessage(List<String> targetFCMTokens, FCMMessageRequest fcmMessageRequest) {
         MulticastMessage multicastMessage = createMulticastMessage(targetFCMTokens, fcmMessageRequest);
         try {
-            firebaseMessaging.sendMulticast(multicastMessage);
+            firebaseMessaging.sendEachForMulticast(multicastMessage);
         } catch (Exception e) {
             log.error("[FirebaseMessagingException] exception ", e);
             // TODO: discord로 알림 추가 혹은 후속 작업 논의 후 추가