Typescript 4.5 Regression

I recently upgraded one of my projects to TypeScript 4.5 and it breaks if the underlying package has defined export map.

I am sharing this repo which demonstrates the issue in isolation.

• The repo has two sub-directories. package and app.
• The package defines the export map along with types key inside the package.json file. The types exports an ambient module.
• The app installs the package and imports the ambient module.
• Running npm run build fails if the app is using typescript@4.5. However compiles fine if using typescript@4.4.