TimestampedGeoJson also accepts Polygon, add to docstring
The `TimestampedGeoJson` class also works when the geometry type is Polygon. Change the docstring to reflect that.
@@ -16,8 +16,8 @@ class TimestampedGeoJson(MacroElement):
into a map with Map.add_child.
A geo-json is timestamped if:
- * it contains only features of types LineString, MultiPoint, MultiLineString
- and MultiPolygon.
+ * it contains only features of types LineString, MultiPoint, MultiLineString,
+ Polygon and MultiPolygon.
* each feature has a 'times' property with the same length as the
coordinates array.
* each element of each 'times' property is a timestamp in ms since epoch,
