decodeFromMap() inserts Double into Int variable

[eydunfe]

Describe the bug
Decoding from map allows Double value to be inserted into Int variable.

To Reproduce

@Serializable
data class Foo (
    @SerialName("1")
    val bar: Int
)

fun main() {
    val map = mapOf<String, Any>(Pair("1", 1.23))
    val decodedFoo = Properties.decodeFromMap(Foo.serializer(), map)
    println(decodedFoo) // Foo(bar=1.23)
}

Environment

• Kotlin version: 1.4.10
• Library version: 1.0.1
• Kotlin platforms: JS
• Gradle version: 6.0.1

[pdvrieze]

This is probably related to JS not having int native types. But it is still incorrect.