Cleanup deprecated methods.

Noticed a handful of deprecated methods and minor warnings while looking around.
Replaces with recommended methods

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

@@ -27,7 +27,7 @@ object JsSodiumLoader {
 
     }
 
-    suspend fun load() = suspendCoroutine<Unit> { continuation ->
+    suspend fun load() = suspendCoroutine { continuation ->
         if (!getSodiumLoaded()) {
             _libsodiumPromise.then<dynamic> {
                 sodium_init()

multiplatform-crypto-libsodium-bindings/src/jsMain/kotlin/com/ionspin/kotlin/crypto/kdf/Kdf.kt

@@ -27,7 +27,7 @@ actual object Kdf {
     ): UByteArray {
         return getSodium().crypto_kdf_derive_from_key(
             subkeyLength.toUInt(),
-            subkeyId.toUInt(),
+            subkeyId,
             context,
             masterKey.toUInt8Array()
         ).toUByteArray()

multiplatform-crypto-libsodium-bindings/src/jsMain/kotlin/com/ionspin/kotlin/crypto/pwhash/PasswordHash.kt

@@ -8,7 +8,7 @@ import ext.libsodium.com.ionspin.kotlin.crypto.toUInt8Array
 actual object PasswordHash {
     /**
      * The crypto_pwhash() function derives an outlen bytes long key from a password passwd whose length is passwdlen
-     * and a salt salt whose fixed length is crypto_pwhash_SALTBYTES bytes. passwdlen should be at least crypto_pwhash_
+     * and a salt whose fixed length is crypto_pwhash_SALTBYTES bytes. passwdlen should be at least crypto_pwhash_
      * PASSWD_MIN and crypto_pwhash_PASSWD_MAX. outlen should be at least crypto_pwhash_BYTES_MIN = 16 (128 bits) and
      * at most crypto_pwhash_BYTES_MAX.
      *