Fix #57

[Bluscream]

    def toDict(self, obj):
        return json.loads(json.dumps(obj, cls=CustomJSONEncoder))

class CustomJSONEncoder(json.JSONEncoder): # <<-- Add this custom encoder 
    """Custom JSON encoder for the DB class."""

    def default(self, o):
        if dataclasses.is_dataclass(o): # this serializes anything dataclass can handle  
            return dataclasses.asdict(o)
        if isinstance(o, datetime): # this adds support for datetime
            return o.isoformat()
        return super().default(o)

[Yepoleb]

You removed the comments and added invalid typing. I am not accepting this.

[Yepoleb]

Dataclasses have been implemented in e40488b88b32f6ccb3a974bc5dbd5da777f3ff83