fix unbound type parameters

[nsajko]

I didn't check, but unbound type parameters can be serious performance bugs.

Found with JuliaLang/julia#46608

[jverzani]

Thanks! Most appreciated. I'll merge in once everything passes CI tests.

[codecov]

Codecov Report

Merging #12 (c644933) into master (98688e2) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #12      +/-   ##
==========================================
+ Coverage   86.91%   86.93%   +0.02%     
==========================================
  Files          19       19              
  Lines        1826     1891      +65     
==========================================
+ Hits         1587     1644      +57     
- Misses        239      247       +8     

Impacted Files	Coverage Δ
src/diagonal-block.jl	97.01% <100.00%> (+0.29%)	⬆️
src/twisted.jl	87.33% <100.00%> (-0.22%)	⬇️
src/AMRVW_algorithm.jl	82.52% <0.00%> (-0.48%)	⬇️
src/rfactorization.jl	83.43% <0.00%> (-0.23%)	⬇️
src/diagonal.jl	85.89% <0.00%> (-0.14%)	⬇️
src/CSS.jl	100.00% <0.00%> (ø)
src/RDS.jl	100.00% <0.00%> (ø)
src/bulge-step.jl	100.00% <0.00%> (ø)
src/utils.jl	97.18% <0.00%> (+0.08%)	⬆️
... and 6 more

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[jverzani]

Thanks for these. I have to address the CI test that is failing and bump the versions. Once that is done, i'll tag a new release.