2.28.0

• Add --preserve-point-density-threshold option to reduce blank areas of the map at low zooms
• Fix tile-join bug where use of --read-from would also accidentally enable --quiet

2.27.0

• Do more of line simplification in integer coordinates, to make behavior consistent across platforms
• Reduce excessive logging during pmtiles conversion
• Add --set-attribute option
• Accept JSON form of --accumulate-attribute