Type AccountResponse not assignable to type Account anymore

[TorstenStueber]

Describe the bug
In the past one could use the value of type AccountResponse returned by loadAccount of class Server directly as an argument for new TransactionBuilder. This standard use case does not work anymore as the TransactionBuilder constructor expects an Account, which has a member createSubaccount on the latest version of stellar-base. This member does not exist on AccountResponse, though.

The reference code does not typecheck anymore.

What version are you on?
8.2.0

To Reproduce
Compile this typescript code:

import { Server, TransactionBuilder } from "stellar-sdk";

async function main() {
  const server = new Server("https://horizon-testnet.stellar.org");
  const accountResponse = await server.loadAccount("GA2Q3Q73GJV56M5YZFFUWP5W4HH3KAAWHAI2RDIYFT4Z7G5KR3V6TAY5");
  new TransactionBuilder(accountResponse, { fee: "100" });
}

main();

This will generate the following error

Argument of type 'AccountResponse' is not assignable to parameter of type 'Account'.

Expected behavior
No error occurs and AccountResponse is assignable to parameter of type Account.

Additional context
Works correctly with version 8.0.0