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- New Features
- Support collecting crawler_stats and crawler_engine via telnet if available
(Note that this feature temporarily only works for [Scrapy 1.5.1](https://doc.scrapy.org/en/latest/news.htmlscrapy-1-5-1-2018-07-12) and its earlier version
since telnet console now requires username and password after [Scrapy 1.5.2](https://doc.scrapy.org/en/latest/news.htmlrelease-1-5-2))
- Improvements
- Set 'pages' and 'items' of the parsing result to None if not available, instead of 0
- Change key of the parsing result from 'elapsed' to 'runtime'