broken in julia 1.3 by added `alg` keyword argument

[JeffBezanson]

julia> m = reshape(rand(BigFloat,2*2), (2,2));

julia> svd(m)
ERROR: MethodError: no method matching svd!(::Array{BigFloat,2}; full=false, alg=LinearAlgebra.DivideAndConquer())
Closest candidates are:
  svd!(::AbstractArray{T,2} where T; full, thin) at /home/jeff/.julia/packages/GenericSVD/ky5Qc/src/GenericSVD.jl:11 got unsupported keyword argument "alg"

We could either allow alg to be passed to the svd! method in this package (and ignore it?), or change the stdlib code to only pass alg along if the user requested it.