Hey! First of all thanks for continuing with this lib! 🥳

I tried to upgrade our project but ran into an issue. It seems like contentlayer2 has an issue with parsing frontmatter in .mdx files:

I tried to add the remark plugin like described here. But it seems like the issue is contentlayer internal. Looking at the code, contentlayer should be able to parse frontmatter already.

Is this a known issue or is it something on our side?