add close with value

[jackyzha0]

Why

const res = await someAsyncCall();
if (!res.ok) {
  resWritable.write(envRes);
  resWritable.close();

  return;
}

we see this pattern a lot in server-side streams and is verbose and prone to accidentally writing to a closed writable (e.g. if proc was cancelled mid someAsyncCall)

What changed

const res = await someAsyncCall();
if (!res.ok) {
  return resWritable.close(envRes);
}

Versioning

• Breaking protocol change
• Breaking ts/js API change

[ryantm]

pog