v0.0.48

What's Changed

• Add env var docs by @jacoblee93 in https://github.com/langchain-ai/langserve/pull/513
• Show line-breaks in chat message content by @jacoblee93 in https://github.com/langchain-ai/langserve/pull/515
• Allow editing of prior messages in the chat playground by @jacoblee93 in https://github.com/langchain-ai/langserve/pull/516
• Release 0.0.48 by @jacoblee93 in https://github.com/langchain-ai/langserve/pull/517

Full Changelog: https://github.com/langchain-ai/langserve/compare/v0.0.47...v0.0.48