Enable MathJax functionality

[jd-foster]

Enable LaTeX to appear in images produced using savefig().

Note that LaTeX rendering in VS Code doesn't seem to work. This applies to saved figures however.

MWE

julia> using LaTeXStrings

julia> using PlotlyKaleido

julia> import PlotlyJS

julia> import PlotlyJS: scatter, attr, Layout

julia> p2 = PlotlyJS.plot(PlotlyJS.scatter(x = rand(10)), Layout(
                       font_size=14,
                       margin=attr(l=80, r=60, b=60, t=80),
                       title = "My Plot",
                       xaxis_title = L"\sqrt{N_c}".s,
                       yaxis_title = L"\int r".s))

julia> PlotlyKaleido.start()

julia> PlotlyKaleido.savefig(p2, "plot3.pdf")
"plot3.pdf"

Before:

After:

[BeastyBlacksmith]

I think it would be good, if there were some way to opt-out or adjust the version.

[jd-foster]

Thanks, I've modified it to opt-in with a Bool, or provided you own URL, or just the version number