Update LinearAlgebra for Julia v1.2 and v1.3

[nickrobinson251]

• Eigenvalues now get sorted by default in v1.2+ (see RFC: sort eigenvalues in a canonical order JuliaLang/julia#21598)
• And we no longer need the eigmax method in v1.3+ (see Broaden signature of eigen and eigvals to AbstractMatrix to allow for Adjoint and Transpose input. JuliaLang/julia#31117)

[codecov]

Codecov Report

Merging #11 into master will increase coverage by 1.39%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
+ Coverage    89.4%   90.79%   +1.39%     
==========================================
  Files           4        4              
  Lines         151      163      +12     
==========================================
+ Hits          135      148      +13     
+ Misses         16       15       -1

Impacted Files	Coverage Δ
src/linalg.jl	97.36% <85.71%> (+0.14%)	⬆️
src/blockdiagonal.jl	78.84% <0%> (+7.41%)	⬆️

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[rofinn]

Can we just add eigsort! and eigmax to Compat.jl?

[nickrobinson251]

Can we just add eigsort! and eigmax to Compat.jl?

yeah if Compat gets eigsort! then we can consider using Compat here

[rofinn]

You can always make a pull request to add it... ;)

[nickrobinson251]

I'd like this to be resolved before using/contributing to Compat
JuliaLang/Compat.jl#651

I think the Version check here are fine for now 🤷‍♂

[rofinn]

LGTM