API browser does not support more complex type anotations

[Talkless]

For example if we have function using Unions, Optionals:

@jsonrpc_client.method('object.trip_stop')
@jwt_required()
def object__trip_stop(
        object_id: Union[int, List[int]],
        time_from: str,
        time_to: str,
        min_moving: Optional[int] = 1,
        min_stationary: Optional[int] = 10,
        zones: Optional[List[int]] = [0],
        time_ranges: Optional[List[List[Union[int, str, str]]]] = [],
        zones_only: Optional[bool] = False,
        trip_mode: Optional[int] = 3,
        trips_stops: Optional[int] = 3
) -> Optional[str]:

We get documentation with just Objects:

[nycholas]

👋 This PR added support to serializable direct classes Python with the default constructor, Python dataclasses, and Pydantic models, see [here](https://github.com/cenobites/flask-jsonrpc/ blob/master/examples/pydantic/run.py#L158) and example of use. The next step is to enhance the schema to reflect the object at the API Browser and be recognized by it.

Payload:

{
    "jsonrpc": "2.0",
    "method": "Petstore.create_pet",
    "params": {
        "pet": {
            "name": "Lou",
            "tag": "dog"
        }
    },
    "id": "5ad1d47f-4e6c-4f24-bfa9-18a3ec340c57"
}