Hello, I am trying to pass line_shape='spline' as documented (https://plotly.com/python-api-reference/generated/plotly.express.line.html#plotly.express.line) but am getting the following error:

` Invalid value of type 'builtins.str' received for the 'shape' property of scattergl.line
Received value: 'spline'

The 'shape' property is an enumeration that may be specified as:
  - One of the following enumeration values:
        ['linear', 'hv', 'vh', 'hvh', 'vhv']`