LP Sensitivity Deprecation Warnings

[pulsipher]

JuMP has deprecated lp_rhs_perturbation_range and lp_objective_perturbation_range in favor of lp_sensitivity_report. We need to shift our API accordiningly.

[odow]

Ah. So it turns out someone was using it! Was it not terribly slow?

[pulsipher]

I imagine it probably was, though I didn't use it much. Since, InfiniteModels wrap around JuMP Models we just have some wrapper methods for lp_rhs_perturbation_range and lp_objective_perturbation_range so users can query them directly if they want to. See the source code below for more info: https://github.com/pulsipher/InfiniteOpt.jl/blob/ef3b82d5a07d6aa10e4707458c09c3d2654bc74a/src/results.jl#L744-L895