Working single shot xchacha20poly1305 encryption and decryption in delegated flavour

multiplatform-crypto-api/src/commonMain/kotlin/com/ionspin/kotlin/crypto/util/CryptoUtil.kt

@@ -5,6 +5,8 @@ package com.ionspin.kotlin.crypto.util
  * ugljesa.jovanovic@ionspin.com
  * on 22-Jun-2020
  */
+val _emit = IntArray(0)
+
 fun UByteArray.overwriteWithZeroes() {
     for (i in 0 until size) {
         this[i] = 0U
@@ -15,4 +17,4 @@ fun UIntArray.overwriteWithZeroes() {
     for (i in 0 until size) {
         this[i] = 0U
     }
-}
+}