@ts-expect-error internal function

### Describe the bug

I also need it, may be it's time to make export it public

https://github.com/intlify/h3/blob/a550a182d0c9a0fc70c3a0ad3a0099de7f39fa76/src/index.ts#L6

### Reproduction

https://github.com/intlify/h3/blob/a550a182d0c9a0fc70c3a0ad3a0099de7f39fa76/src/index.ts#L6

### System Info

```Shell
nuxt 3
```

### Used Package Manager

npm

### Additional context

_No response_

### Validations

- [x] Follow our [Code of Conduct](https://github.com/intlify/.github/blob/main/CODE_OF_CONDUCT.md)
- [x] Read the [Contributing Guide](https://github.com/intlify/h3/blob/main/CONTRIBUTING.md).
- [x] Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
- [x] Check that this is a concrete bug. For Q&A, please open a GitHub Discussion instead.
- [x] The provided reproduction is a [minimal reproducible](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.