Dataclasses-json

Introduce API for global config of encoders by type (139).

To elaborate, you can now define globally how to encode any unsupported
_type_, rather than have to specify for every individual _field_.

Fix nested optional type (167). Thanks RunOrVeith

Fix `from_dict` annotations (156). Thanks eqperes

Introduce API for undefined fields. Thanks RunOrVeith and
Germandrummer92

Fix api type hints. Thanks JoeyBG

Make type annotations visible to mypy. Thanks gward

Fix `bytes` encoder. Thanks tstehr