Give an error when a default import failed #434

Describe the feature

I noticed that if the imported file doesn't have a default export and I'm expecting a default export via

await jiti.import('filePath', { default: true });

then it doesn't throw or give an error response.

I'd like to be able to detect that there was no default export when it's expected.

Additional information

• Would you be willing to help implement this feature?