Bump to NLPModels 0.20

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (a1e5f8c) 96.70% compared to head (4a61017) 96.70%.

Additional details and impacted files

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[github-actions[bot]]

Package name	latest	stable
DCISolver.jl
JSOSolvers.jl
Percival.jl