Function tilePxBounds

tilePxBounds(
tile: [zoom: number, x: number, y: number],
tileSize?: number,
): BBox
Convert a tile x-y-z to a bbox of the form [w, s, e, n]
Parameters
- tile: [zoom: number, x: number, y: number]
  the tile
- tileSize: number = 512
  in pixels
Returns BBox
- the bbox