Handle ULong -> UInt conversions, update api to reflect stream_chacha20_ietf takes UInt for initial counter

multiplatform-crypto-libsodium-bindings/src/jvmMain/kotlin/com/ionspin/kotlin/crypto/JnaLibsodiumInterface.kt

@@ -1236,7 +1236,7 @@ interface JnaLibsodiumInterface : Library {
         message: ByteArray,
         messageLength: Long,
         nonce: ByteArray,
-        initialCounter : Long,
+        initialCounter : Int,
         key: ByteArray
     ) : Int
 

multiplatform-crypto-libsodium-bindings/src/jvmMain/kotlin/com/ionspin/kotlin/crypto/stream/Stream.kt

@@ -32,7 +32,7 @@ actual object Stream {
     actual fun chacha20IetfXorIc(
         message: UByteArray,
         nonce: UByteArray,
-        initialCounter: ULong,
+        initialCounter: UInt,
         key: UByteArray
     ): UByteArray {
         val result = UByteArray(message.size)
@@ -42,7 +42,7 @@ actual object Stream {
             message.asByteArray(),
             message.size.toLong(),
             nonce.asByteArray(),
-            initialCounter.toLong(),
+            initialCounter.toInt(),
             key.asByteArray()
         )