https://github.com/leeoniya/uPlot/compare/1.6.3...1.6.4

• bands now properly clip strokes, too (e.g. stacking stroked bars)
• it's now possible to redraw axes without invalidating scales, e.g. to change the tick value formatting or precision. (#437)
• series._focus prop to help check if a series is focused by cursor (#429)
• opts.pxAlign & series.pxAlign opts to opt out of canvas translation during path & point drawing (#442)
• perf improvements to linear path builder when qty of datapoints <= width pixels
• various tweaks to uPlot.join()
• multi-bars demo improvements
• scale-affixed stroke gradient demo: https://leeoniya.github.io/uPlot/demos/gradient-stroke.html