Test request throws exception with cloudformation-cli 0.1.6. Fails to parse new fields. #109

START RequestId: af819c5a-99f5-1d9c-ad69-7614c2c1d235 Version: $LATEST
[ERROR]	2020-08-07T21:56:25.652Z	af819c5a-99f5-1d9c-ad69-7614c2c1d235	Invalid request
Traceback (most recent call last):
  File "/var/task/cloudformation_cli_python_lib/resource.py", line 103, in _parse_test_request
    **event.request
TypeError: __init__() got an unexpected keyword argument 'region'
[ERROR]	2020-08-07T21:56:25.653Z	af819c5a-99f5-1d9c-ad69-7614c2c1d235	Handler error
Traceback (most recent call last):
  File "/var/task/cloudformation_cli_python_lib/resource.py", line 103, in _parse_test_request
    **event.request
TypeError: __init__() got an unexpected keyword argument 'region'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/var/task/cloudformation_cli_python_lib/resource.py", line 119, in test_entrypoint
    session, request, action, callback_context = self._parse_test_request(event)
  File "/var/task/cloudformation_cli_python_lib/resource.py", line 110, in _parse_test_request
    raise InternalFailure(f"{e} ({type(e).__name__})") from e
cloudformation_cli_python_lib.exceptions.InternalFailure: __init__() got an unexpected keyword argument 'region' (TypeError)
END RequestId: af819c5a-99f5-1d9c-ad69-7614c2c1d235