CompatHelper: add new compat entry for PyPlot at version 2, (keep existing compat)#1

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compathelper/new_version/2021-11-03-00-58-31-081-00329233217MLackner/PyPlot2Igor.jl:compathelper/new_version/2021-11-03-00-58-31-081-00329233217Copy head branch name to clipboard