deprecation warnings back

[gideonsimpson]

After a recent update (using Julia 1.1), I started getting these sorts of warnings again when using pyplot (with Julia Plots):
┌ Warning: getindex(o::PyObject, s::Symbol) is deprecated in favor of dot overloading (getproperty) so elements should now be accessed as e.g. o.sinstead ofo[:s]. │ caller = py_add_series(::Plots.Plot{Plots.PyPlotBackend}, ::Plots.Series) at pyplot.jl:592 └ @ Plots /Users/guardian/.julia/packages/Plots/QYETN/src/backends/pyplot.jl:592

[stevengj]

Those warnings are not from PyPlot.jl, they are from Plots.jl. They are fixed in JuliaPlots/Plots.jl#1956, which has not yet been tagged in a release.