v0.0.45

What's Changed

• Adds playground chat widget for message list inputs, additional global callback for chunks by @jacoblee93 in https://github.com/langchain-ai/langserve/pull/489
• Release 0.0.45 by @eyurtsev in https://github.com/langchain-ai/langserve/pull/498

Full Changelog: https://github.com/langchain-ai/langserve/compare/v0.0.44...v0.0.45