Add `cividis` colormap

[t-bltg]

Adds support for cividis colormap from https://github.com/marcosci/cividis under MIT licensing.

[codecov[bot]]

Codecov Report

Merging #96 (0607f60) into master (bcf62f7) will not change coverage. The diff coverage is n/a.

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  Coverage   75.00%   75.00%           
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  Files           1        1           
  Lines         116      116           
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  Hits           87       87           
  Misses         29       29           

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[cormullion]

Hi! The reason cividis isn't in is because it was already in PlotUtils and Makie, etc.. I'm guessing there won't be any problems in duplicating the colorscheme here as well, but it would be great if you could test your fork against Plots etc to check that there isn't a clash at any stage....

[t-bltg]

Hum, Plots uses ColorSchemes, :cividis got introduced in https://github.com/JuliaPlots/PlotUtils.jl/pull/87, with no mention why it was added there and not in ColorSchemes, the table should be removed if introduced here.

I've tested this PR with (@v1.7) pkg> test Plots and (@v1.7) pkg> test Makie without issues.

I'll need this for https://github.com/JuliaPlots/UnicodePlots.jl/pull/272.

[cormullion]

Cool, thanks! I'll make a release today or tomorrow...

[cormullion]

by the way - will I need to update this when your UnicodePlots updates are done?

[t-bltg]

No, providing a Vector of RGB tuples will still supported.

By the way, savefig(p, "name.png") is supported since UnicodePlots 2.10 (and integrates well with png(...) from Plots) ;)

using ColorSchemes, UnicodePlots
z = rand(50, 100)
p = heatmap(z; title = "Hot!", colormap = map(x -> (x.r, x.g, x.b), ColorSchemes.leonardo.colors))
savefig(p, "hot.png"; transparent = false)

[cormullion]

Cool, thanks. UnicodePlots remains awesome 😀