Bump async from 2.6.3 to 2.6.4 in /fixtures/concurrent/time-slicing#24443

kassens merged 1 commit intomainfacebook/react:mainfrom

dependabot/npm_and_yarn/fixtures/concurrent/time-slicing/async-2.6.4facebook/react:dependabot/npm_and_yarn/fixtures/concurrent/time-slicing/async-2.6.4Copy head branch name to clipboard