Merge pull request #103 from JuliaPlots/sd/observable_revamp

backward compat to new change in Observables

src/StatsMakie.jl

@@ -3,9 +3,18 @@ module StatsMakie
 using Observables
 using AbstractPlotting
 import AbstractPlotting: convert_arguments, used_attributes, plot!, combine, to_plotspec
-using AbstractPlotting: plottype, Plot, PlotFunc, to_value, to_node, to_tuple
+using AbstractPlotting: plottype, Plot, PlotFunc, to_tuple
 using AbstractPlotting: node_pairs, extrema_nan, automatic, default_theme
 using AbstractPlotting: GeometryTypes
+
+# Moved in https://github.com/JuliaGizmos/Observables.jl/pull/40
+if isdefined(Observables, :to_value)
+    using Observables: to_value
+else
+    using AbstractPlotting: to_value
+end
+
+
 using Statistics, KernelDensity
 import StatsBase
 using Distributions