lineEach returns LineString including properties, bbox & id

[DenisCarriere]

lineEach callback => LineString including properties, bbox & id

Don't know if this was intentional, but the lineEach method was only returning coordinates of a lineString instead of the Feature<LineString>. Not returning the Feature makes it difficult to extract things like Properties/id/BBox of the given feature.

Example (once PR is merged)

const properties = {foo: 'bar'};
const bbox = [0, 0, 10, 10];
const id = 'foo';
const line = lineString([[0, 0], [10, 10]], properties, bbox, id);

meta.lineEach(line, currentLine => {
  //= currentLine.id => 'foo'
  //= currentLine.bbox => [0, 0, 10, 10]
  //= currentLine.properties => {foo: 'bar'}
});

CC: @rowanwins @stebogit