Allow custom JSON encoder for converting claims dict

[chbndrhnns]

I am using this snippet to allow a custom JSON encoder to be used (which is patching parts of python-jose):

from jose import jws, jwt
from jose.utils import base64url_encode
from my_encoder import MyEncoder

def _encode_with_my_encoder(payload):
    """Encode the payload with custom JSON encoder which knows how
    to handle the custom types
    """
    if isinstance(payload, Mapping):
        try:
            payload = json.dumps(
                payload,
                separators=(',', ':'),
                cls=MyEncoder
            ).encode('utf-8')
        except ValueError:
            pass

    return base64url_encode(payload)


jws._encode_payload = _encode_with_juice_encoder

Would it be feasible to support passing in a custom encoder class into the encode method?

[chbndrhnns]

Is this kind of change unwanted? I would love some feedback.

[MarkParker5]

I need it

[Leithal3]

IMO would also be good to add the option to jwt.encode()