Add an option history for all Krylov methods

[amontoison]

close #268
@geoffroyleconte

[codecov]

Codecov Report

Merging #274 (edf1a68) into master (bd040c1) will decrease coverage by 0.22%.
The diff coverage is 95.55%.

@@            Coverage Diff             @@
##           master     #274      +/-   ##
==========================================
- Coverage   97.25%   97.02%   -0.23%     
==========================================
  Files          32       32              
  Lines        3495     3495              
==========================================
- Hits         3399     3391       -8     
- Misses         96      104       +8     

Impacted Files	Coverage Δ
src/minres.jl	100.00% <ø> (ø)
src/symmlq.jl	97.83% <71.42%> (ø)
src/bicgstab.jl	100.00% <100.00%> (ø)
src/bilq.jl	100.00% <100.00%> (ø)
src/bilqr.jl	100.00% <100.00%> (ø)
src/cg.jl	100.00% <100.00%> (ø)
src/cg_lanczos.jl	100.00% <100.00%> (ø)
src/cgls.jl	100.00% <100.00%> (ø)
src/cgne.jl	100.00% <100.00%> (ø)
src/cgs.jl	100.00% <100.00%> (ø)
... and 20 more

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[dpo]

Is this supposed to be merged before #269 ?

[amontoison]

Yes, I want to do a release before we break everything with #269 and #271 .