Put constructor parameters on new lines

[panpanini]

To aid readability, put all constructor parameters on a new line. Ideally the output should look like:

data class Thing(
    @JvmField
    val id: String = "",
    @JvmField
    val version: Int = 0,
    val unknownFields: Map<Int, UnknownField> = emptyMap()
) : Message<Thing>, Serializable {
    ...
}

[panpanini]

This will automatically happen when the parameter count > 2, however we can not manually control it with the current version of KotlinPoet