message: fix(core): fix incorrect return type on presignTransaction
  Ticket:
diff: @@ -404,7 +404,7 @@ export abstract class BaseCoin {
  /**
  * Coin-specific things done before signing a transaction, i.e. verification
  */
  - presignTransaction(params: PresignTransactionOptions): Promise<TransactionPrebuild> {
  + presignTransaction(params: PresignTransactionOptions): Promise<PresignTransactionOptions> {
  return Promise.resolve(params);
  }
  