with latest vapour (>0.8.0) need _raster example to deal with Byte

[mdsumner]

 u <- "WMS:https://tiles.maps.eox.at/?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=s2cloudless-2019&SRS=EPSG:4326&BBOX=-180.000000,-90.000000,180.000000,90.000000&FORMAT=image/png&TILESIZE=256&OVERVIEWCOUNT=17&MINRESOLUTION=0.0000053644180298&TILED=true"
im <- gdalio_raster(u, bands = 1:3)
Error in .local(x, values, ...) : 
  values must be numeric, integer or logical.