TypeError datetime.date(2017, 3, 28) is not JSON serializable

[gabn88]

On line 335 of corejson.py json.dumps is called which causes this error.

/lib/python3.5/site-packages/coreapi/codecs/corejson.py in encode
                    return force_bytes(json.dumps(data, **kwargs)) 

Using DRF I wanted to use coreapi to create the schemes, however when rendering the view I get this error. In DRF this is solved by using a custom JSONEncoder (which subclasses json.JSONEncoder), in rest_framework.utils.encoders... It might be a good idea to include the custom encoder also in this package, what do you think?