[BUG] Request headers not set in the response

[IV1T3]

Describe the bug
The request headers are not set in the response object. As shown in the example below, even though request headers were sent, the Headers object is empty in the response.

To Reproduce

>>> from curl_cffi import requests
>>> res = requests.get("https://httpbin.org/headers")
>>> res.json()
{'headers': {'Accept': '*/*', 'Accept-Encoding': 'gzip, deflate, br, zstd', 'Host': 'httpbin.org', 'X-Amzn-Trace-Id': 'Root=1-66b8ff1e-50969ef8662112f677a6f081'}}
>>> res.request.__dict__
{'url': 'https://httpbin.org/headers', 'headers': Headers({}), 'method': 'GET'}

This also happens using a Session

Expected behavior
I expect the headers to be set.

Versions

• curl_cffi '0.7.1'

[perklet]

Indeed, will fix later. However, avoid using __dict__ if it's not for demostration here.