Merge latest monero dart changes [skip ci]

cw_core/pubspec.lock

@@ -660,10 +660,10 @@ packages:
     dependency: "direct main"
     description:
       name: unorm_dart
-      sha256: "5b35bff83fce4d76467641438f9e867dc9bcfdb8c1694854f230579d68cd8f4b"
+      sha256: "23d8bf65605401a6a32cff99435fed66ef3dab3ddcad3454059165df46496a3b"
       url: "https://pub.dev"
     source: hosted
-    version: "0.2.0"
+    version: "0.3.0"
   vector_math:
     dependency: transitive
     description:

cw_monero/lib/monero_wallet.dart

@@ -480,6 +480,7 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance,
             monero.CoinsInfo_frozen(coin),
             monero.CoinsInfo_unlocked(coin),
           );
+          // TODO: double-check the logic here
           if (unspent.hash.isNotEmpty) {
             unspent.isChange = transaction_history.getTransaction(unspent.hash).isSpend == true;
           }