Client get_ticket_types() errors out on "options" asset class

从 RESTClient.get_ticker_types(asset_class="options", locale="us") 开始，并将其响应处理方式与 issue 中所示的 /v3/reference/tickers/types 请求进行比较。重现 None 响应，并跟踪它如何传递给 TickerTypes。完成的标准是 options 情况能够在不产生 TypeError 的情况下得到处理并返回预期的 ticker types，同时覆盖空响应或有效响应。

Describe the bug

The get_ticker_types() and/or the /v3/reference/tickers/types behaves unexpectedly when "options" is used as a the asset class.

If I run the query in the documentation page, I get a 200 response with no results.

To Reproduce

With the client:

client = RESTClient(polygon_key)
types = client.get_ticker_types(asset_class="options", locale="us")

or with requests:

resp = requests.get(
    url="https://api.polygon.io/v3/reference/tickers/types",
    params={
        "apiKey": polygon_key,
        "asset_class": "options",
        "locale": "us",
    }
)
print(resp.status_code)
print(resp.json())

Expected behavior

I expected to receive the list of ticker types for options, analogously with how the endpoint works for stocks.

Observed behavior

Using the client I get:

TypeError: polygon.rest.models.tickers.TickerTypes() argument after ** must be a mapping, not NoneType

and with requests:

200
{'results': None, 'count': 0, 'status': 'OK', 'request_id': '14e8456dd17092c22d5d062f0c99434d'}