Error parsing start_date when it's a datetime object

[davidbrann]

It uses the end_date parameter rather than the start_date

Starting at Line 85 of client.py:

 if start_date:
            if isinstance(start_date, str):
                date = parser(start_date)
            elif isinstance(end_date, datetime.date):
                            ^^^^^^                                   
                date = end_date
                        ^^^^^^