Use Setfield.jl instead of reconstruct?

[mauro3]

Consider using https://github.com/jw3126/Setfield.jl instead of reconstruct for good performance. Although, it potentially generates a lot of generated functions...

x-ref: https://discourse.julialang.org/t/ann-setfield-jl-yet-another-package-for-working-with-immutables/9267

[mauro3]

Probably not, to keep things simple. X-ref #105