Log Message:
graphics/wallust: update to 2.8.0

new minor version: 2.8.0
 - automate the creation of wallust.toml (missing word wrapping) [82c2911b11]
 - implement color saturation optionally [24afe5754f]
 - and avaliable with --saturation cli flag [67f0fde295]
 - ensure a readable contrast in between palettes [b9f35899b6]
 - colorspaces:
     - labmixed: truly mix colors, instead of the old workaround of only mixing
       luminance, by converting to rgb. [7b015e7cbf]
     - internals:
         - implement gather_cols() [7f4df61f58]
            = gather_cols_lazy() [ed488ca9d7]
         - implement .set_luminance() [18ff9ac6b3]
         - store an additional array of most prominent first [45a0b0260a]
         - hardcode lightest and darkest values intead of calculating them,
           ensuring a constant palette, which probably fixed monochromes
           palettes a bit [c48e5c7460]
 - filters:
     - resized: respect aspect ratio [62885455c0e034c3c0765bdecb085b28128344f0}
     - add 16 variation of all other filters schemes [0e3f8ff125]
     - internals: accept Cols instead of raw [u8] [be41968427]
 - sort cli flags in alphabetical order [925e59aa72]
 - sort subcommand cli flags in alphabetical order [53043d23e5]
 - support "this-name" as well as "thisname" either in the \ 
config file and the
   command line (e.g. wallust image.png -c labmixed is the same as wallust
   image.png -c lab-mixed) [08f1b0559c]
 - --update-current/-u cli flag to only update terminal colors in the current
   session [7f4df61f58]
 - add alpha template variable inside wallust.toml [67ede320d7]
 - add {alpha_dec} to templates variable, indicates a decimal representation
   for the alpha value [077440c8b1]
 - add a debug subcommad [225543f7bb]
 - reword a bit descriptions of wallust.toml
 - update dependencies