Traceback (most recent call last):
  File "/home/jbliss/miniconda3/envs/xonsh/lib/python3.6/site-packages/gitlab/objects.py", line 2141, in available
    return json.dumps(ProjectService._service_attrs.keys())
  File "/home/jbliss/miniconda3/envs/xonsh/lib/python3.6/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/home/jbliss/miniconda3/envs/xonsh/lib/python3.6/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/home/jbliss/miniconda3/envs/xonsh/lib/python3.6/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/home/jbliss/miniconda3/envs/xonsh/lib/python3.6/json/encoder.py", line 180, in default
    o.__class__.__name__)
TypeError: Object of type 'dict_keys' is not JSON serializable