Tests call `await client.destroy()`, but `destroy()` doesn't return a promise

[lewisdaly]

This is a minor nitpick, but I noticed it and was confused, so I figured I'd open an issue for it.

According to the Client interface, destroy returns void:
https://github.com/tigerbeetledb/tigerbeetle-node/blob/de2272194719a33a013ab5f0a09ce4bead91283c/src/index.ts#L200

But in the tests we have: https://github.com/tigerbeetledb/tigerbeetle-node/blob/de2272194719a33a013ab5f0a09ce4bead91283c/src/test.ts#L343

I'm guessing that the line in the tests are a simple typo.