Tyler.PlotConfig docs have broken example

[joshday]

The docstring has this example:

  using Tyler, GLMakie
  
  config = PlotConfig(
      preprocess = (data) -> data .+ 1,
      postprocess = (plot) -> translate!(plot, 0, 0, 1),
      color = :red
  )
  lat, lon = (52.395593, 4.884704)
  delta = 0.1
  extent = Extent(; X=(lon - delta / 2, lon + delta / 2), Y=(lat - delta / 2, lat + delta / 2))
  Tyler.Map(extent; provider=Tyler.TileProviders.Esri(:WorldImagery), plot_config=config)

The last line generates many warnings and a blank plot:

┌ Warning: error while creating tile
│   exception =
│    MethodError: no method matching +(::RGB{FixedPointNumbers.N0f8}, ::Int64)
...

[asinghvi17]

The provider should probably be an elevation provider...

(data) -> data .+ 1

But we should fix that, maybe apply a tint or something