Add DataStructures v0.17-v0.19 compatibility with version branching#3959

ChrisRackauckas merged 1 commit intoSciML:masterSciML/ModelingToolkit.jl:masterfrom

ChrisRackauckas-Claude:datastructures-v0.18-v0.19-compatChrisRackauckas-Claude/ModelingToolkit.jl:datastructures-v0.18-v0.19-compatCopy head branch name to clipboard