Fix bug

lib/src/models/signaling_info.dart

@@ -65,7 +65,8 @@ class InvitationInfo {
   /// 平台[Platform]
   int? platformID;
 
-  InvitationInfo({this.inviterUserID,
+  InvitationInfo(
+      {this.inviterUserID,
       this.inviteeUserIDList,
       this.groupID,
       this.roomID,
@@ -127,9 +128,9 @@ class SignalingCertificate {
     token = json['token'];
     roomID = json['roomID'];
     liveURL = json['liveURL'];
-    busyLineUserIDList =
+    busyLineUserIDList = null == json['busyLineUserIDList']
-    null == json['busyLineUserIDList'] ? null : json['busyLineUserIDList'].cast<
+        ? null
-        String>();
+        : json['busyLineUserIDList'].cast<String>();
   }
 
   Map<String, dynamic> toJson() {