WIP: allow a more SY-like predorcent stepper

[chriscoey]

No description provided.

[codecov]

Codecov Report

Merging #727 (412df9b) into master (012786a) will increase coverage by 0.02%.
The diff coverage is 98.82%.

@@            Coverage Diff             @@
##           master     #727      +/-   ##
==========================================
+ Coverage   97.25%   97.27%   +0.02%     
==========================================
  Files          53       53              
  Lines        8040     8066      +26     
==========================================
+ Hits         7819     7846      +27     
+ Misses        221      220       -1     

Impacted Files	Coverage Δ
src/Cones/epipersepspectral/matrixcsqr.jl	100.00% <ø> (ø)
src/Solvers/steppers/predorcent.jl	92.72% <94.44%> (+0.89%)	⬆️
src/Cones/Cones.jl	97.43% <100.00%> (+0.76%)	⬆️
src/Cones/nonnegative.jl	96.96% <100.00%> (+0.09%)	⬆️
src/Solvers/search.jl	100.00% <100.00%> (ø)
src/Solvers/steppers/combined.jl	89.69% <100.00%> (+0.10%)	⬆️

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