categorical_group = false causes error due to AoG

[vladdez]

categorical_group = false gives error
ERROR: Dictionaries.IndexError("Dictionary does not contain index: group")
in

include("../docs/example_data.jl")
m = example_data("UnfoldLinearModel")
res_effects2 = effects(Dict(:condition => ["car", "face"], :continuous => -5:5), m)
plot_erp(
        res_effects2;
        mapping = (; color = :continuous, group = :continuous),
        categorical_color = false,
        categorical_group = false,
    )

So only continuous group is accepted.
I checked it and realized that in this function from AoG there is no field/index group which cause an error

function aesthetic_mapping(::Type{ScatterLines}, N::Int)
    dictionary([
        pointlike_positionals(N)...,
        :color => AesColor,
        :strokecolor => AesColor,
        :marker => AesMarker,
        :markersize => AesMarkerSize,
        :linestyle => AesLineStyle,
    ])
end

So it doesn't allow continuous groups
How to solve it?

[vladdez]

at the end we just depreciated this argument
fixed in #237