chore: export token transfer transaction

Ticket: WIN-7155

Author: yash-bitgo

modules/sdk-coin-tao/src/lib/index.ts

@@ -10,6 +10,7 @@ export {
 
 export { TransactionBuilderFactory } from './transactionBuilderFactory';
 export { TokenTransferBuilder } from './tokenTransferBuilder';
+export { TokenTransferTransaction } from './tokenTransferTransaction';
 export { TransferBuilder } from './transferBuilder';
 export { StakingBuilder } from './stakingBuilder';
 export { UnstakeBuilder } from './unstakeBuilder';