PaletteTarget constructor
      
      PaletteTarget({})
     
    
Creates a PaletteTarget for custom palette selection.
Implementation
PaletteTarget({
  this.minimumSaturation = 0.0,
  this.targetSaturation = 0.5,
  this.maximumSaturation = 1.0,
  this.minimumLightness = 0.0,
  this.targetLightness = 0.5,
  this.maximumLightness = 1.0,
  this.isExclusive = true,
});