JsonWebToken.TryGetPayloadValue() can no longer be used with dictionary types

[kevinchalet]

Consider the following JWT payload:

{
  "a": {
    "prop1": [
      "value1",
      "value2"
    ]
  },
  "exp": 1692706803,
  "iat": 1692703203,
  "nbf": 1692703203
}

The following snippet works just fine on 7.0.0-preview but fails on 7.0.0-preview3 (TryGetPayloadValue returns false):

var handler = new JsonWebTokenHandler();
var token = handler.ReadJsonWebToken("eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJhIjp7InByb3AxIjpbInZh" +
    "bHVlMSIsInZhbHVlMiJdfSwiZXhwIjoxNjkyNzA2ODAzLCJpYXQiOjE2OTI3MDMyMDMsIm5iZiI6MTY5MjcwMzIwM30.dZ" +
    "lSC8OLOKUvSCXu9uZFb91NQwWBJ7dwSxEn-WA2RVEBW1l3Wu2wdobOuezivtzX9OWpgYyvzog4nHfD-Yco4Ou5qYqN0JbB" +
    "fU7gESA95iDtDhbDzVB8T3W3T7k3a1LHwVNZbBGTnZQMgF447R-euIlMcGY6p5WQFLyFPZjBOKW2nlwh0MYQQ-5mZpEgzE" +
    "pdcHVOjdO0pV1EJTKFjHuiUuFsI6d6i3dLOQYX2JpaclT--pTFqs4Nx1O8gn9bKbfKTpGlpy2CpJJLmmzKqsLWtrXL0eSD" +
    "QQBK0ynvd6ssRARH_L3f9Hf05oBRqiqO3ukWw8qAoBE-ZF6906gYnwMcYA");

if (token.TryGetPayloadValue("a", out Dictionary<string, string[]> dictionary))
{
    Console.WriteLine("The dictionary has been correctly deserialized.");
}

/cc @brentschmaltz @jennyf19

[brentschmaltz]

@kevinchalet in our haste to remove our internal newtonsoft, we have some regressions, we will fix them.

[jennyf19]

Included in preview4 release