fix: Math.ceil float values before creating a BigInt

[Salgueirinho]

Description

Fixes a bug when creating a BigInt from a float number.

Fixes #501

Type of change

• 🔧 Bug fix
• 💡 New feature
• 🔩 Performance improvement
• 📚 Docs

If the feature is substantial or introduces breaking changes without a discussion, its best to open an issue first.

Checklist

• I commented my code
• Added/modified unit tests
• I made corresponding changes to the documentation

Additional Notes

Running pnpm install updated some dependencies

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Latest commit: f4bd620

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