<@U0BFDUP0E> Because `Long` on Kotlin/JS is emulat...

# coroutines

[elizarov]

@jw Because Long on Kotlin/JS is emulated via an object, while Int is "native". This approach avoids extra overhead when using it on Kotlin/JS. The non-timeout version is declared in common module, too, while timeout version with Long is JVM-only.