Version 2.2.2 has breaking behaviour

[frankvdp]

When creating a unit test for a GET request, providing query parameters as data={"key": "value"}, the latest version introduced a json.dumps on the dictionary, resulting in an error like: `

def urlencode(query, doseq=False):
    """
    A version of Python's urllib.parse.urlencode() function that can operate on
    MultiValueDict and non-string values.
    """
    if isinstance(query, MultiValueDict):
        query = query.lists()
    elif hasattr(query, 'items'):
        query = query.items()
    query_params = []

  for key, value in query:

E ValueError: not enough values to unpack (expected 2, got 1)

venv/lib/python3.8/site-packages/django/utils/http.py:111: ValueError`

When pinning to version 2.2.1, this problem is no longer there.

It appears to be caused by the file test_plus/test.py:381 kwargs["data"] = json.dumps(data) if data is not None else None