TransactionStream type is wrong when using API version 2

[justmoon]

In src/models/methods/subscribe.ts, line 289 the TransactionStream type declares a field called transaction which contains the main transaction data.

However, in reality, when using API version 2, this field appears to be called tx_json now.

It appears that similar changes were in fact taken into account in other places, such as here in accountTx.ts but overlooked in this instance.