2.14.1
Support asynchronous start requests (#6729)
Deprecate spider args of middlewares and pipelines. (#7006)
Add is_asyncio_available(). (#6827)
Add `AsyncCrawlerProcess` and `Crawler.crawl_async()` (#6817)
adding black formatter to all the code
Fix and ban the top-level twisted.internet.reactor imports. (#6835)
Fix shutdown tests. (#6772)
Use twisted.python.log instead of failure.printTraceback().