julia-vim syntax highlighting incompatible with rainbow parenthesis

[rpxn]

julia-vim syntax highlighting is incompatible with rainbow parenthesis/brackets:
https://github.com/luochen1990/rainbow

rainbow is compatible with the syntax highlighting that comes with vim for other languages but
with julia-vim within function blocks it reverts to usual julia-vim highlighting.

Others have this problem with a related rainbow parenthesis/brackets plugin:
https://discourse.julialang.org/t/julia-vim-and-rainbow-brackets/57180

[carlobaldassi]

This is a long-standing issue, but it's quite difficult to make the two plugins compatible, see this (very old, so I'm not sure how up-to-date it is) comment in a related issue: #94 (comment)