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kotlinlang

Hello, does Kotlin native supports unsigned values? Currently running `Compiler version info: Konan: 1.7.0 / Kotlin: 1.7.20` I am getting these kind of errors
```api.cpp:14475:871: error: unknown type name 'libnative_kref_kotlin_UInt'; did you mean 'libnative_kref_kotlin_Int'?
api.cpp:14412:1533: error: unknown type name 'libnative_kref_kotlin_ULong'; did you mean 'libnative_kref_kotlin_Long'?```
The documentation seems to say it should be supported.

Here the kind of code I use
```interface GetAppStartTimeUseCase {
    operator fun invoke(): UInt?
}```
```class GetAppStartTimeUseCaseImpl : GetAppStartTimeUseCase {
    override operator fun invoke(): UInt = 0u
}```

Not using unsigned makes the code compile