Clear and concise description of the problem

When using the config option exports: true, the indentation is overwritten to use two spaces, regardless of what it was before:

Suggested solution

It would be ideal if the exports feature could auto-detect and use the actual indentation used in the package.json.

Alternative

A config option where the desired indentation could be specified.

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.