Checklist

• Did you run the analyzer with the --dev flag to get more information?
• Did you create a minimal reproduction in the playground?

Completing the items above will greatly improve triaging time of your issue.

Expected behavior
A clear and concise description of what you expected to happen.

the to-markdown package does not provide types, since they aren't exported from the package.
The existing types key in the package.json does refer to a non-existing file.