Yarn v2 error because `unist-util-stringify-position` is not in `package.json`

[dungle-scrubs]

When using Yarn v2, I get the following error:

Error: mdast-util-mdx-jsx tried to access unist-util-stringify-position, but it isn't declared in its dependencies; this makes the require call ambiguous and unsound.

I can see that from-markdown.js has var stringifyPosition = require('unist-util-stringify-position')

Should this be added to package.json?

[wooorm]

Yup, thanks!