invert matrix when using heatmap about unicodeplots.jl HOT 3 CLOSED

julia> using UnicodePlots, Statistics, DataFrames
help?> heatmap
[...]
    •  array : use array display convention (origin at the North-West
       corner of the plot, hence flipping y versus regular plots).
[...]
julia> data = rand(9, 9);
julia> columns = map(i -> Symbol(:col, i), 1:9);
julia> df = DataFrame(data, Symbol.(columns));
julia> cor_data = cor(Matrix(df));
julia> heatmap(cor_data; array=true)
     ┌─────────┐  1  
   1 │▄▄▄▄▄▄▄▄▄│ ┌──┐
     │▄▄▄▄▄▄▄▄▄│ │▄▄│
     │▄▄▄▄▄▄▄▄▄│ │▄▄│
     │▄▄▄▄▄▄▄▄▄│ │▄▄│
   9 │▄▄▄▄▄▄▄▄▄│ └──┘
     └─────────┘ -0.8
      1       9