Rosnik

* Add `requests` to dependencies
* Reraise `ImportError`when `openai` isn't available

Fix: add urllib3 as a required dependency

**Full Changelog**: https://github.com/rosnik-ai/rosnik-python/compare/v0.0.22...v0.0.23

Initial release of rosnik-python. If you're interested in learning more about what we're building, reach out to us via hellorosnik.ai ✨