Remove SuiteSparse from dependencies

[lostella]

It's been merged into SparseArrays

[codecov]

Codecov Report

Merging #149 (098d95e) into master (86dcef2) will decrease coverage by 0.09%.
The diff coverage is 100.00%.

❗ Current head 098d95e differs from pull request most recent head 21d7f3d. Consider uploading reports for the commit 21d7f3d to get more accurate results

@@            Coverage Diff             @@
##           master     #149      +/-   ##
==========================================
- Coverage   95.61%   95.52%   -0.09%     
==========================================
  Files          79       79              
  Lines        2483     2483              
==========================================
- Hits         2374     2372       -2     
- Misses        109      111       +2     

Files	Coverage Δ
src/calculus/epicomposeQuadratic.jl	100.00% <ø> (ø)
src/functions/indAffine.jl	90.00% <ø> (ø)
src/functions/indAffineDirect.jl	97.50% <100.00%> (ø)
src/functions/indGraphSparse.jl	100.00% <ø> (ø)
src/functions/leastSquaresDirect.jl	93.42% <100.00%> (ø)
src/functions/quadraticDirect.jl	97.82% <100.00%> (ø)

... and 1 file with indirect coverage changes

[lostella]

This is apparently still a separate stdlib in Julia 1.6