Log Message:
py-openapi-core: updated to 0.19.3

0.19.3

Bug fixes

Fix resolver for jsonschema validator created by SchemaValidatorsFactory
Use base_uri from schema path for spec validation
Openapi 3.0 unmarshalling None with nullable subschema fix

Deprecations

spec_base_uri configuration is deprecated. Use base_uri parameter in \ 
OpenAPI.from_dict and OpenAPI.from_file if you want to define it.