Bump version to 0.5.1

[frapac]

No description provided.

[codecov-commenter]

Codecov Report

Merging #234 (9731f30) into master (be4f87e) will increase coverage by 1.21%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #234      +/-   ##
==========================================
+ Coverage   74.31%   75.53%   +1.21%     
==========================================
  Files          38       38              
  Lines        3703     3446     -257     
==========================================
- Hits         2752     2603     -149     
+ Misses        951      843     -108     

Impacted Files	Coverage Δ
src/LinearSolvers/linearsolvers.jl	0.00% <0.00%> (-20.00%)	⬇️
src/Interfaces/utils.jl	66.03% <0.00%> (-2.69%)	⬇️
src/utils.jl	83.78% <0.00%> (-1.94%)	⬇️
src/Interfaces/MOI_interface.jl	70.55% <0.00%> (-1.74%)	⬇️
src/options.jl	96.42% <0.00%> (-0.24%)	⬇️
src/KKT/KKTsystem.jl	97.14% <0.00%> (-0.23%)	⬇️
src/IPM/utils.jl	93.25% <0.00%> (-0.22%)	⬇️
lib/MadNLPHSL/src/ma77.jl	96.20% <0.00%> (-0.10%)	⬇️
src/KKT/sparse.jl	99.28% <0.00%> (-0.03%)	⬇️
lib/MadNLPPardiso/src/pardisomkl.jl	98.50% <0.00%> (-0.03%)	⬇️
... and 16 more

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