rtc-v0.15.2

What's Changed

• Expose participant kind from the ffi by @keepingitneil in https://github.com/livekit/python-sdks/pull/249
• Update version by @keepingitneil in https://github.com/livekit/python-sdks/pull/250

Full Changelog: https://github.com/livekit/python-sdks/compare/rtc-v0.15.1...rtc-v0.15.2