add missing fields to AuthenticatorAttestationResponse toJSON web-pla…

…tform test.

Differential Revision: https://phabricator.services.mozilla.com/D197959

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1873537
gecko-commit: 7f87b0764c74048b838db26d830890ad54891dd3
gecko-reviewers: keeler

webauthn/public-key-credential-to-json.https.window.js

@@ -97,6 +97,9 @@ function authenticatorResponseToJson(response) {
       (isAttestation ?
            [
              'clientDataJSON', 'attestationObject',
+             {name: 'getAuthenticatorData', target: 'authenticatorData'},
+             {name: 'getPublicKey', target: 'publicKey'},
+             {name: 'getPublicKeyAlgorithm', target: 'publicKeyAlgorithm'},
              {name: 'getTransports', target: 'transports'}
            ] :
            ['clientDataJSON', 'authenticatorData', 'signature', 'userHandle']);