Release 6.4.2

6.4.2 (2026-01-14)

Bug Fixes

• check tooltip for custom formatters (#9735) (1f3c725)
• merge legends on explicit color scale/range/domain (#9696) (5ba092c), closes #9599 #5996 #3797
• tooltip data "undefined" when using nearest hit testing (#9707) (e7f5511)