Fix failing tests

test/models/transactions_model_test.dart

@@ -143,7 +143,7 @@ void main() {
         ]
       });
       expect(txChunk.toString(),
-          "timestamp: 993260735 transactions: [\n    {txid: txid, type: txType, subType: mint, value: 10, fee: 1, height: 1, confirm: true, confirmations: 1, address: address, timestamp: 1876352482, worthNow: 1, inputs: [], slateid: slateId } \n]");
+          "timestamp: 993260735 transactions: [\n    {txid: txid, type: txType, subType: mint, value: 10, fee: 1, height: 1, confirm: true, confirmations: 1, address: address, timestamp: 1876352482, worthNow: 1, inputs: [], slateid: slateId, numberOfMessages: null } \n]");
     });
   });
 

test/services/coins/firo/firo_wallet_test.dart

@@ -105,6 +105,7 @@ void main() {
               nonce: null,
               inputs: [],
               outputs: [],
+              numberOfMessages: null,
             ),
           )
           .toList();

test/services/coins/manager_test.dart

@@ -126,6 +126,7 @@ void main() {
       nonce: null,
       inputs: [],
       outputs: [],
+      numberOfMessages: null,
     );
     when(wallet.transactions).thenAnswer((_) async => [
           tx,

test/widget_tests/transaction_card_test.dart

@@ -71,6 +71,7 @@ void main() {
       nonce: null,
       inputs: [],
       outputs: [],
+      numberOfMessages: null,
     )..address.value = Address(
         walletId: "walletId",
         value: "",
@@ -188,6 +189,7 @@ void main() {
       nonce: null,
       inputs: [],
       outputs: [],
+      numberOfMessages: null,
     )..address.value = Address(
         walletId: "walletId",
         value: "",
@@ -302,6 +304,7 @@ void main() {
       nonce: null,
       inputs: [],
       outputs: [],
+      numberOfMessages: null,
     )..address.value = Address(
         walletId: "walletId",
         value: "",
@@ -410,6 +413,7 @@ void main() {
       nonce: null,
       inputs: [],
       outputs: [],
+      numberOfMessages: null,
     )..address.value = Address(
         walletId: "walletId",
         value: "",