fix: allow string[] in arg signature

[danielroe]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Currently we have an issue when spreading parsed args as the resulting type has a signature that is not compatible with the type of _.

You might want to prevent array type from key signature for another reason - if so, let's chat.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #56 (42b1b75) into main (d7a601d) will not change coverage.
The diff coverage is n/a.

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