JSONDecodeError when get_history datetimes are out of range

[humatic]

When the start and end times used with the get_history method are out of range, the exception is not properly handled. For example, this requests data for 2017 (it is now 2016). A JSONDecodeError results.

response = oanda.get_history(
    instrument='EUR_USD',
    granularity='M5',
    start=1503619200,
    end=1504051200
    )

I'm testing using a practice account.