message: Fix listening to cancellation tokens in completionItemProvider
diff: @@ -43,7 +43,7 @@ export default class OmniSharpCompletionItemProvider extends AbstractSupport imp
  try {
  let responses = await serverUtils.autoComplete(this._server, req);
  - if (!responses) {
  + if (!responses || token && token.isCancellationRequested) {
  return;
  }
  