Response headers support in contrib

[p1c2u]

No description provided.

[codecov]

Codecov Report

Merging #333 (a4cba7c) into master (10675ca) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #333      +/-   ##
==========================================
+ Coverage   95.69%   95.77%   +0.07%     
==========================================
  Files          80       80              
  Lines        1650     1655       +5     
==========================================
+ Hits         1579     1585       +6     
+ Misses         71       70       -1     

Impacted Files	Coverage Δ
openapi_core/contrib/falcon/responses.py	91.66% <ø> (ø)
openapi_core/contrib/flask/responses.py	100.00% <ø> (ø)
openapi_core/contrib/django/compat.py	100.00% <100.00%> (ø)
openapi_core/contrib/django/requests.py	100.00% <100.00%> (ø)
openapi_core/contrib/django/responses.py	100.00% <100.00%> (ø)
openapi_core/contrib/requests/responses.py	100.00% <100.00%> (ø)
openapi_core/exceptions.py	88.46% <0.00%> (+1.92%)	⬆️

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