this.socketInt.getSendQueueCount is undefined in transports/http3-quiche/lib/socket.js

I found this by testing several JavaScript runtimes using the `WebTransport` client from this repository, along with the `WebTransport` server from this repository. Bun throws ``` terminate called after throwing an instance of 'Napi::Error' what(): Invalid state: Controller is already closed Aborted ``` when closing the `WebTransport` (`WebTransportBase` class) client connection Deno throws this when closing the connection client side, which gives us an object reference ``` terminate called after throwing an instance of 'Napi::Error' what(): this.sockterminate called after throwing an instance of 'Napi::Error' what(): Invalid state: Controller is already closed AbortedetInt.getSendQueueCount is not a function Aborted ``` There are two (2) references to `this.socketInt.getSendQueueCount()` in this code base that I could find, here, where the function is called, yet never defined https://github.com/fails-components/webtransport/blob/1f42b584321bf4f26f282858b9e40d63db0c03cc/transports/http3-quiche/lib/socket.js#L131-L140