Add missing HTTP status codes

[0xd669]

What do these changes do?

Extend list of web_exceptions, add HTTPUnprocessableEntity, HTTPFailedDependency, HTTPInsufficientStorage status codes

Are there changes in behavior for the user?

Use HTTPUnprocessableEntity, HTTPFailedDependency, HTTPInsufficientStorage to respond with appropriate status codes.

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• If you provide code modification, please add yourself to CONTRIBUTORS.txt
• Add a new entry to CHANGES.rst

[codecov-io]

Codecov Report

Merging #1920 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1920      +/-   ##
==========================================
+ Coverage   97.05%   97.05%   +<.01%     
==========================================
  Files          37       37              
  Lines        7604     7610       +6     
  Branches     1328     1328              
==========================================
+ Hits         7380     7386       +6     
  Misses        101      101              
  Partials      123      123

Impacted Files	Coverage Δ
aiohttp/web_exceptions.py	100% <100%> (ø)	⬆️

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[asvetlov]

Thanks for contribution!

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