an ESS-Julia-mode appears available ...
https://github.com/syl20bnr/spacemacs/blob/ef5a2ad5ee6362588244374364fe4ac2df066f37/layers/%2Blang/ess/packages.el#L41
an ESS-Julia-mode appears available ...
https://github.com/syl20bnr/spacemacs/blob/ef5a2ad5ee6362588244374364fe4ac2df066f37/layers/%2Blang/ess/packages.el#L41