Bug 1559299 [wpt PR 17337] - Update interfaces/web-nfc.idl, a=testonly

Automatic update from web-platform-tests
Update interfaces/web-nfc.idl (#17337)

Source: https://github.com/tidoust/reffy-reports/blob/2756789/whatwg/idl/web-nfc.idl
Build: https://travis-ci.org/tidoust/reffy-reports/builds/545592907
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wpt-commits: 44943db7deaaa8f7d9dae2c60f5cf3037c7b7bf1
wpt-pr: 17337

testing/web-platform/tests/interfaces/web-nfc.idl

@@ -43,7 +43,7 @@ interface NFCReader : EventTarget {
 [Constructor(DOMString type, NFCReadingEventInit readingEventInitDict), SecureContext, Exposed=Window]
 interface NFCReadingEvent : Event {
   readonly attribute DOMString serialNumber;
-  readonly attribute NDEFMessage message;
+  readonly attribute object message;  // NDEFMessage
 };
 
 dictionary NFCReadingEventInit : EventInit {