Request response binary format support

[p1c2u]

Backward incompatibilities

• body of Request protocol returns bytes instead of str
• data of Response protocol returns bytes instead of str

[codecov[bot]]

Codecov Report

Merging #710 (10fdbea) into master (16e7b1a) will increase coverage by 0.00%. The diff coverage is 89.15%.

@@           Coverage Diff           @@
##           master     #710   +/-   ##
=======================================
  Coverage   91.01%   91.02%           
=======================================
  Files         127      127           
  Lines        3986     4011   +25     
  Branches      488      492    +4     
=======================================
+ Hits         3628     3651   +23     
- Misses        294      295    +1     
- Partials       64       65    +1     

Files	Coverage Δ
openapi_core/contrib/aiohttp/requests.py	93.54% <100.00%> (ø)
openapi_core/contrib/django/requests.py	95.83% <100.00%> (ø)
openapi_core/contrib/django/responses.py	100.00% <100.00%> (ø)
openapi_core/contrib/falcon/responses.py	93.75% <100.00%> (+1.44%)	:arrow_up:
openapi_core/contrib/requests/responses.py	100.00% <100.00%> (ø)
openapi_core/contrib/werkzeug/requests.py	93.54% <100.00%> (ø)
openapi_core/contrib/werkzeug/responses.py	100.00% <100.00%> (ø)
...penapi_core/deserializing/media_types/datatypes.py	100.00% <100.00%> (ø)
...pi_core/deserializing/media_types/deserializers.py	86.36% <100.00%> (-0.16%)	:arrow_down:
...enapi_core/deserializing/media_types/exceptions.py	87.50% <100.00%> (ø)
... and 12 more