minor regression: customdata is sometimes a tuple

[nicolaskruchten]

This returns a numpy array in 4.14.3 and a tuple in 5.1.0:

import plotly.express as px
fig = px.scatter(px.data.tips(), x="total_bill", y="tip", custom_data=["sex"])
fig.data[0].customdata

Ideally we would get back to the old behaviour if possible.

[nicolaskruchten]

Closed by #3293