Add support for ConstraintPrimal of nonlinear constraints

[odow]

Closes #592

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 92.21%. Comparing base (deab7ff) to head (5eff0f5).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/MOI_wrapper/MOI_nonlinear.jl	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #593      +/-   ##
==========================================
- Coverage   92.25%   92.21%   -0.05%     
==========================================
  Files           6        6              
  Lines        2646     2658      +12     
==========================================
+ Hits         2441     2451      +10     
- Misses        205      207       +2     

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[odow]

I need to double check the coverage

[odow]

I need to double check the coverage

This exposed a bug in MOI that I need to fix.