Log Message:
py-scrapy: updated to 1.6.0

Scrapy 1.6.0:

Highlights:
* better Windows support;
* Python 3.7 compatibility;
* big documentation improvements, including a switch
  from .extract_first() + .extract() API to .get() + .getall()
  API;
* feed exports, FilePipeline and MediaPipeline improvements;
* better extensibility: :signal:item_error and
  :signal:request_reached_downloader signals; from_crawler support
  for feed exporters, feed storages and dupefilters.
* scrapy.contracts fixes and new features;
* telnet console security improvements, first released as a
  backport in :ref:release-1.5.2;
* clean-up of the deprecated code;
* various bug fixes, small new features and usability improvements across
  the codebase.