message: [cli] Await the FS watcher closing when shutting down `vc dev`
  This was missing for some reason :thinking_cat:
diff: @@ -919,7 +919,7 @@ export default class DevServer {
  if (this.watcher) {
  debug(`Closing file watcher`);
  - this.watcher.close();
  + ops.push(this.watcher.close());
  }
  if (this.updateBuildersPromise) {
  