[template] don't compile highlighters test-data
[template] don't compile highlighters test-data

for syntax-highlighting submodule. See discussion on
https://github.com/zsh-users/zsh-syntax-highlighting/pull/443

Fixes #205

joshuarubin/dotfiles,joshuarubin/dotfiles,joshuarubin/dotfiles,Eriner/zim,joshuarubin/dotfiles