--exportDefault generates default exports eventhough there are none

[Joel Sandén]

Describe the bug
When turning on --exportDefault it returns a default export for all files even if the file itself has no default export. This is a issue since only some of my files has default exports.

To Reproduce
Steps to reproduce the behavior:

1. create a project
2. Create some files and mix default exports and non defaults
3. run barrelsby with --exportDefault
4. All files in the index file gets a default export eventhough some does not have it

Expected behavior
only export default exports when they're available

Screenshots

[github-actions]

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[Denis Maliyshock]

I also have this. Any updates?