Default to useFileOutput = true for readable streams

Author: mattt

lib/stream.js

@@ -52,7 +52,7 @@ class ServerSentEvent {
  * @returns {ReadableStream<ServerSentEvent> & AsyncIterable<ServerSentEvent>}
  */
 function createReadableStream({ url, fetch, options = {} }) {
-  const { useFileOutput = false, headers = {}, ...initOptions } = options;
+  const { useFileOutput = true, headers = {}, ...initOptions } = options;
 
   return new ReadableStream({
     async start(controller) {