more macos targets again

src/commonMain/kotlin/org/komputing/khash/keccak/extensions/PublicExtensions.kt

@@ -11,6 +11,10 @@ fun ByteArray.digestKeccak(parameter: KeccakParameter): ByteArray {
     return Keccak.digest(this, parameter)
 }
 
+fun UByteArray.digestKeccak(parameter: KeccakParameter): UByteArray {
+    return Keccak.digest(this.toByteArray(), parameter).toUByteArray()
+}
+
 /**
  * Computes the proper Keccak digest of [this] string based on the given [parameter]
  */