Limit openapi dependencies upper bounds

[p1c2u]

No description provided.

[codecov]

Codecov Report

Merging #386 (cd295d8) into master (388bb3b) will increase coverage by 28.54%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #386       +/-   ##
===========================================
+ Coverage   67.22%   95.77%   +28.54%     
===========================================
  Files          80       80               
  Lines        2606     1824      -782     
  Branches        0      273      +273     
===========================================
- Hits         1752     1747        -5     
+ Misses        854       57      -797     
- Partials        0       20       +20     

Impacted Files	Coverage Δ
openapi_core/casting/schemas/util.py	80.00% <0.00%> (-20.00%)	⬇️
openapi_core/unmarshalling/schemas/formatters.py	78.57% <0.00%> (-14.29%)	⬇️
openapi_core/unmarshalling/schemas/util.py	80.64% <0.00%> (-9.68%)	⬇️
openapi_core/schema/servers.py	92.85% <0.00%> (-7.15%)	⬇️
openapi_core/spec/shortcuts.py	90.90% <0.00%> (-0.76%)	⬇️
...pi_core/deserializing/media_types/deserializers.py	95.00% <0.00%> (+4.52%)	⬆️
openapi_core/__init__.py	100.00% <0.00%> (+4.54%)	⬆️
openapi_core/contrib/django/requests.py	100.00% <0.00%> (+5.00%)	⬆️
openapi_core/casting/schemas/casters.py	97.14% <0.00%> (+5.25%)	⬆️
openapi_core/contrib/django/responses.py	100.00% <0.00%> (+7.14%)	⬆️
... and 43 more

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