Private classes in public files trigger missing tests check

[MiSikora]

When a class is private but it is in a public file it triggers the check like here. We don't use the latest 1.2.0 version in Pocket Casts but I don't see any changes in the git history that might got it fixed.

Here's a sample of offending code. I'm guessing a bit because I didn't check dangermattic project out to test it but it replicates more or less the code from the failing PR.

Assume Hello.kt file.

class Hello {
    private val worlds = listOf(Earth(), Mars())

    fun print() = worlds.joinToString(prefix = "Hello, ", separator = ", ", postfix = "!", transform = World::print)
}

private interface World {
    fun print(): String
}

private class Earth : World {
    override fun print() = "Earth"
}

private class Mars : World {
    override fun print() = "Mars"
}