Add generic hash tests, add templates for secret stream jvm and js

multiplatform-crypto-libsodium-bindings/src/jsMain/kotlin/com/ionspin/kotlin/crypto/generichash/GenericHash.kt

@@ -30,7 +30,7 @@ actual object GenericHash {
         requestedHashLength: Int,
         key: UByteArray?
     ): GenericHashState {
-        val state = getSodium().crypto_generichash_init(key.toUInt8Array(), requestedHashLength)
+        val state = getSodium().crypto_generichash_init(key?.toUInt8Array() ?: Uint8Array(0), requestedHashLength)
         return GenericHashState(requestedHashLength, state)
     }
 

multiplatform-crypto-libsodium-bindings/src/jsMain/kotlin/com/ionspin/kotlin/crypto/secretstream/SecretStream.kt

@@ -0,0 +1,34 @@
+package com.ionspin.kotlin.crypto.secretstream
+
+actual typealias SecretStreamState = Any
+
+actual object SecretStream {
+    actual fun xChaCha20Poly1305InitPush(key: UByteArray): SecretStreamStateAndHeader {
+        TODO("not implemented yet")
+    }
+
+    actual fun xChaCha20Poly1305Push(
+        state: SecretStreamState,
+        message: UByteArray,
+        additionalData: UByteArray,
+        tag: UByte
+    ): UByteArray {
+        TODO("not implemented yet")
+    }
+
+    actual fun xChaCha20Poly1305InitPull(
+        key: UByteArray,
+        header: UByteArray
+    ): SecretStreamStateAndHeader {
+        TODO("not implemented yet")
+    }
+
+    actual fun xChaCha20Poly1305Pull(
+        state: SecretStreamState,
+        ciphertext: UByteArray,
+        additionalData: UByteArray
+    ): DecryptedDataAndTag {
+        TODO("not implemented yet")
+    }
+
+}