Incorrect encoding of LineStrings when using fromGeojsonVt

[ibesora]

When using geojsonvt to create tilesets I found that some layers were incorrectly rendered.
Examining what happened I found that the geometry that comes from geojsonvt contains all the LineString geometry on a single array: instead of having [[x0, y0], [x1, y1], ..., [xN, yN]] it's all flattened as [x0, y0, x1, y1, ... xN, yN].
When using fromGeojsonVT this is not correctly interpreted in FeatureWrapper::loadGeometry so the geometry contains an array of Points with undefined coordinates.

Should something be implemented in vt-pbf::fromGeojsonVt to correctly interpret this case?
I was thinking about modifying GeoJSONWrapper to also store the feature type so when geometry is loaded from a LineString it checks wether the geometry comes as a single array or an array of arrays.