Adding constraints to current UniformSolver

[Ole626]

This PR contains the ability to add constraints to an already instantiated UniformSolver at runtime.

Part of Herb-AI/HerbSearch.jl#164.

[codecov]

Codecov Report

❌ Patch coverage is 4.34783% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.08%. Comparing base (44e8858) to head (8dba153).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/solver/generic_solver/generic_solver.jl	0.00%	11 Missing ⚠️
src/solver/uniform_solver/uniform_solver.jl	8.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #106      +/-   ##
==========================================
- Coverage   79.28%   78.08%   -1.21%     
==========================================
  Files          30       30              
  Lines        1511     1533      +22     
==========================================
- Hits         1198     1197       -1     
- Misses        313      336      +23     

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