fix: 修复IDFA 接口缺失的问题

Runtime/GuruAnalytics/Runtime/Script/GuruAnalytics.cs

@@ -163,6 +163,12 @@ namespace Guru
             if (string.IsNullOrEmpty(idfv)) return;
             CacheUserProperty(Analytics.PropertyIDFV, idfv);
         }
+        
+        public static void SetIDFA(string idfa)
+        {
+            if (string.IsNullOrEmpty(idfa)) return;
+            CacheUserProperty(Analytics.PropertyIDFA, idfa);
+        }
 
 
         /// <summary>