SU and Symbolics upgrade

[xtalax]

No description provided.

[codecov]

Codecov Report

Merging #243 (c5070c2) into master (47fdca7) will decrease coverage by 1.65%.
The diff coverage is 100.00%.

❗ Current head c5070c2 differs from pull request most recent head cda1380. Consider uploading reports for the commit cda1380 to get more accurate results

@@            Coverage Diff             @@
##           master     #243      +/-   ##
==========================================
- Coverage   78.81%   77.16%   -1.65%     
==========================================
  Files          39       39              
  Lines        1987     1984       -3     
==========================================
- Hits         1566     1531      -35     
- Misses        421      453      +32     

Impacted Files	Coverage Δ
src/interface/MOLFiniteDifference.jl	90.00% <ø> (ø)
src/MOL_symbolic_utils.jl	65.49% <100.00%> (-0.72%)	⬇️
src/discretization/discretize_vars.jl	85.55% <100.00%> (-1.12%)	⬇️
...schemes/nonlinear_laplacian/nonlinear_laplacian.jl	100.00% <100.00%> (ø)
src/interface/solution/common.jl	19.69% <0.00%> (-22.73%)	⬇️
src/MOL_discretization.jl	63.97% <0.00%> (-11.03%)	⬇️
src/system_parsing/pde_system_transformation.jl	41.89% <0.00%> (-0.56%)	⬇️

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