Switch to Ruff & Test Python 3.12

[dbanty]

No description provided.

[codecov]

Codecov Report

Merging #870 (9a9f54f) into main (4be2047) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #870   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           49        49           
  Lines         1920      1918    -2     
=========================================
- Hits          1920      1918    -2     

Files	Coverage Δ
openapi_python_client/__init__.py	100.00% <100.00%> (ø)
openapi_python_client/cli.py	100.00% <ø> (ø)
openapi_python_client/config.py	100.00% <ø> (ø)
openapi_python_client/parser/openapi.py	100.00% <100.00%> (ø)
...penapi_python_client/parser/properties/__init__.py	100.00% <100.00%> (ø)
...i_python_client/parser/properties/enum_property.py	100.00% <ø> (ø)
..._python_client/parser/properties/model_property.py	100.00% <100.00%> (ø)
...penapi_python_client/parser/properties/property.py	100.00% <100.00%> (ø)
openapi_python_client/parser/properties/schemas.py	100.00% <100.00%> (ø)
..._client/schema/openapi_schema_pydantic/callback.py	100.00% <100.00%> (ø)
... and 4 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more