Fix invalid limit

[nosshar]

kossh/src/main/kotlin/kossh/impl/SSHScp.kt

Line 93 in f7d671e

val parts = remoteDestination.split("/".toRegex(), -1)

Kotlin version: 1.4.10

Argument limit=-1 goes to underlying kotlin.text.Regex.split(input: CharSequence, limit: Int = 0) which doesn't accept negative values:
require(limit >= 0, { "Limit must be non-negative, but was $limit." })