There's a merged pull request on the void-packages repository

julia: update to 1.4.0.
https://github.com/void-linux/void-packages/pull/20353

Description:
This commit also changes julia from using the distributions openblas
to having julia vendor in its own version because julia by default
vendors openblas with 64-bit integers (ILP64). Some
packages (e.g. Arpack.jl) do not function correctly when openblas is
built using 32-bit integers. This change adds 28M to the
package-size.

https://github.com/JuliaLang/julia/blob/master/doc/build/distributing.md#notes-on-blas-and-lapack

[ci skip] for building llvm