v0.10.0

Added

• Spectrum / heatmap gradient coloring — color each point by its value (cool → warm) with SeriesColorGradient, the built-in HeatmapSpectrum palette, or your own stops (-g on the CLI). (#84)

command for above realtime plot

{ while true; do echo $((RANDOM % 100)); sleep 0.4; done; } | asciigraph -r -g cyan,magenta -w 60 -h 15

• Threshold coloring — highlight points that breach a limit with ColorAbove / ColorBelow (or -ca / -cb on the CLI). Applies across all series and takes precedence over solid/gradient colors. (#85, closes #38)

• Flicker-free realtime mode — new ClearLines redraws only the previous graph instead of wiping the whole screen, so -r no longer flickers and preserves any output above the chart. (#79, closes #44)