Openai-responses

Adds support for [moderations endpoint](https://platform.openai.com/docs/api-reference/moderations/create).

Issues:

- [23: feat: add support for moderation endpoint](https://github.com/mharrisb1/openai-responses-python/issues/23)

Pull requests:

- [61: feat(routes): add moderation route support](https://github.com/mharrisb1/openai-responses-python/issues/61)

Bumps support range to include OpenAI Python SDK v1.42. Also adds env for testing Pydantic V1 and V2 in tox.

Adds support for [structured outputs](https://openai.com/index/introducing-structured-outputs-in-the-api/) and the `beta.chat.completions` route.

Misc:

- Adds a working example of how to use this library to test `langchain-openai` (asked about in [58: Would `openai-responses-python` work with langchain_openai?](https://github.com/mharrisb1/openai-responses-python/issues/58))

Bumps support range to include OpenAI Python SDK v1.40.

Bumps support range to include OpenAI Python SDK v1.38. Also removes dependency on `faker`.

Bumps support range to include OpenAI Python SDK v1.37.