More typing for scrapy/*.py

[wRAR]

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[codecov]

Codecov Report

Merging #6005 (6834f4a) into master (34d050c) will decrease coverage by 0.15%.
The diff coverage is 82.20%.

❗ Current head 6834f4a differs from pull request most recent head 8a0108b. Consider uploading reports for the commit 8a0108b to get more accurate results

@@            Coverage Diff             @@
##           master    #6005      +/-   ##
==========================================
- Coverage   89.07%   88.92%   -0.15%     
==========================================
  Files         162      162              
  Lines       11412    11443      +31     
  Branches     1853     1860       +7     
==========================================
+ Hits        10165    10176      +11     
- Misses        949      962      +13     
- Partials      298      305       +7     

Files Changed	Coverage Δ
scrapy/logformatter.py	88.63% <50.00%> (-6.37%)	⬇️
scrapy/middleware.py	93.22% <57.14%> (-4.97%)	⬇️
scrapy/dupefilters.py	82.71% <60.00%> (-3.36%)	⬇️
scrapy/core/scheduler.py	91.97% <66.66%> (-1.27%)	⬇️
scrapy/utils/request.py	95.41% <66.66%> (-0.68%)	⬇️
scrapy/spiderloader.py	96.36% <75.00%> (-3.64%)	⬇️
scrapy/link.py	89.47% <81.81%> (-10.53%)	⬇️
scrapy/responsetypes.py	91.78% <86.66%> (-2.51%)	⬇️
scrapy/spiders/__init__.py	93.75% <89.47%> (-2.92%)	⬇️
scrapy/core/scraper.py	85.02% <100.00%> (+0.08%)	⬆️
... and 2 more