Nonlinear BVP benchmark

[ChrisRackauckas]

https://github.com/maysam-gholampour/IonicLiquidDeh1DSteady.jl

@ErikQQY this is a good case to turn into a benchmark from @maysam-gholampour

[ChrisRackauckas]

Oh it's already simplified in SciML/BoundaryValueDiffEq.jl#242. That makes it really easy to make into a work-precision diagram.