Breaking `Instant` class deprecation: new replaced class should be also serializable

[orchestr7]

@SinceKotlin("2.1") we are suggested to migrate to kotlin.time.Instant:

@Deprecated(
    "Use kotlin.time.Instant instead",
    ReplaceWith("kotlin.time.Instant", "kotlin.time.Instant"),
    level = DeprecationLevel.WARNING
)
@Serializable(with = InstantSerializer::class)
public expect class Instant : Comparable<Instant> {

But this class is npt serializable:

@SinceKotlin("2.1")
@ExperimentalTime
public class Instant internal constructor(

[DmitryNekrasov]

@orchestr7 Hello! Could you please tell me which version of kotlinx.serialization are you using? kotlinx.serialization supports kotlin.time.Instant serialization since version 1.9 - https://github.com/Kotlin/kotlinx.serialization/releases/tag/v1.9.0

[fzhinkin]

Note that there's also an issue with Idea and AndroidStudio that may cause false-negative error messages about the Instant missing its serializer: Kotlin/kotlinx.serialization#3026 (comment)

But even though an IDE will highlight code as problematic, it will be compiled without any issues.