types: add generics to isError and update DataT default generic param

[DamianGlowala]

🔗 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

Makes isError generic, hence removing the need to explictly annotate the return type of createError.

@pi0, shall we consider amending the default generic param for DataT from any to unknown, as per this discussion?

📝 Checklist

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0ff34bc) 84.43% compared to head (d5d921d) 84.43%.
Report is 1 commits behind head on main.

Additional details and impacted files

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  Coverage   84.43%   84.43%           
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  Files          32       32           
  Lines        3752     3752           
  Branches      556      559    +3     
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  Hits         3168     3168           
  Misses        584      584           

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[pi0]

@pi0, shall we consider amending the default generic param for DataT from any to unknown, as per nuxt/nuxt#24396 (comment)?

Would it be necessary for generic support? If yes, sure LGTM as breaking change surface for error data type seems low. (in general, i prefer any => unknown migrations in major versions but this seems small)

[danielroe]

This looks good to me. I'd recommend migrating to unknown here as @pi0 is happy to do it in a non major version. ❤️

[pi0]

Probably doing release by next week but you can try using nightly channels 👍🏼 (And thanks!)