Update service_generator.py

Update service_generator.py

Fix parameter type checks for OpenAPI 3.0 and 3.1

Replaces usage of the generic Parameter class with version-specific Parameter30 and Parameter31 classes to ensure correct type checking for parameters in OpenAPI 3.0 and 3.1 specs. Adds regression test and test data for issue MarcoMuellner#120 to verify correct handling of query parameters with enums and defaults.

feat: bump version to 2.0.0 for release

Update pyproject.toml

Merge pull request MarcoMuellner#81 from MarcoMuellner/80-modulenotfo…

…underror-no-module-named-yaml

feat: Added test matrix for multiple versions

Merge remote-tracking branch 'origin/main'

Merge pull request MarcoMuellner#76 from MarcoMuellner/pydantic_v2

Pydantic v2

chore: Updated version

chore: Updated version