fix(contract):signTransaction using 'latest' blockNumber

packages/harmony-contract/src/contract.ts

@@ -100,4 +100,7 @@ export class Contract {
   runEventFactory(): Contract {
     return new EventFactory(this).addEventsToContract();
   }
+  connect(wallet: Wallet): void {
+    this.wallet = wallet;
+  }
 }

packages/harmony-contract/src/methods/method.ts

@@ -149,7 +149,7 @@ export class ContractMethod {
         undefined,
         updateNonce,
         'rlp',
-        'pending',
+        'latest', // 'pending',
       );
       this.contract.address = TransactionFactory.getContractAddress(signed);
       this.contract.setStatus(ContractStatus.SIGNED);