Add style for timestamped geojson

[soymsk]

Timestamped geojson plugin cannot add style for features, so I've made them in properties.

Multi-colored lines can be :

features = [
    {
        "type": "Feature",
        "geometry": {
            "type": "LineString",
            "coordinates": l.coordinates,
        },
        "properties": {
            "times": l.dates,
            "style": {
                "color":  l.color, # Add geojson style
            }
        }
    }
for l in lines]
folium.plugins.TimestampedGeoJson({
    "type": "FeatureCollection",
    "features": features,
}, period="PT1M", add_last_point=True)

I've also added add_last_point option to turn off last point marker for each line's end.

[stickler-ci]

E131 continuation line unaligned for hanging indent

[ocefpaf]

Thanks! LGTM. Just one request and one suggestion: can you add a changelog entry for this? And, if you if have some spare time, can you also add a notebook to the example directory? I am planning on running nbsphinx/gallery on that directory to improve the docs.

[soymsk]

@ocefpaf Thanks for taking time to review my PR!
I've added changelog and an example in plugins notebook.

[ocefpaf]

Thanks! Hope to see more PRs from you again 😉