symbolIcon.constantForeground is an array of strings instead of a string #410
Description
There's a discussion over at shikijs/shiki#894 where we've highlighted a bug that is caused when using github-dark-default and github-dark-high-contrast. To us it seems that symbolIcon.constantForeground is incorrectly set to an array of string instead of a string itself.
I'm wondering if it supposed to be an array. I'm trying to pinpoint wether there's a bug in in this codebase (which is the upstream source of Shiki), or if Shiki is incorrectly parsing a correct value from this codebase.