4.1.2 has breaking changes, which really shouldn't be in a patch version update - so e.g. pnpm update will break anything using this on 4.1.2

Suggestion: Publish 4.1.3 which reverts back to 4.1.1's state so that pnpm update and friends are fixed, then publish 5.0.0 with the breaking changes

The README.md example seems to show using await on functions like .send() or .connect(), but these don't actually seem to wait for their completion or even return a Promise at all.

You can easily see this if you try to await client.connect() and then await client.send() with any send options, since it'll just error saying that there is no open connection.