Fix #133 (Support sortby)

[dlfivefifty]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 92.85714% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.08%. Comparing base (375e53c) to head (da5462c).

Files	Patch %	Lines
src/eigenSelfAdjoint.jl	92.85%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #134   +/-   ##
=======================================
  Coverage   96.08%   96.08%           
=======================================
  Files          11       11           
  Lines        1636     1636           
=======================================
  Hits         1572     1572           
  Misses         64       64           

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[andreasnoack]

Let's change the CI settings in a separate PR except possibly the nightly testing if it is failing.

[dlfivefifty]

I reverted CI but that means codecov is not being run. It looks like the function

LinearAlgebra.eigen!(A::SymmetricTridiagonalFactorization; tol = eps(real(eltype(A))), sortby::Union{Function,Nothing}=LinearAlgebra.eigsortby)

is not tested. Since SymmetricTridiagonalFactorization is an internal type do we actually need this function? Or we could just delete it.

[andreasnoack]

I reverted CI but that means codecov is not being run.

Not sure I follow. The results are uploaded here https://app.codecov.io/gh/JuliaLinearAlgebra/GenericLinearAlgebra.jl/commit/81eee0d5e9c00f50a0fe79c761d99ef7373dff2c