resampling_when breaks with dynspread

[ahuang11]

import numpy as np
df = pd.DataFrame({
    # random
    "longitude": np.random.uniform(-180, 180, 1000),
    "latitude": np.random.uniform(-90, 90, 1000),
})

df.hvplot.points(
    "longitude",
    "latitude",
    rasterize=True,
    tiles="CartoDark",
    geo=True,
    resample_when=300,
    cmap="fire",
    dynspread=True
)

ValueError: spreading can only be applied to Image or RGB Elements. Received object of type <class 'geoviews.element.geo.Points'>