v0.3.0

What's Changed

• Update unit tests to catch up with langchain-core by @eyurtsev in https://github.com/langchain-ai/langserve/pull/743
• upgrade to pydantic 2 by @eyurtsev in https://github.com/langchain-ai/langserve/pull/744
• migrate examples to pydantic 2 by @eyurtsev in https://github.com/langchain-ai/langserve/pull/745
• chat-playground: update to handle oneOf (resulted from pydantic upgrade) by @eyurtsev in https://github.com/langchain-ai/langserve/pull/746
• update default playground to handle oneOf type by @eyurtsev in https://github.com/langchain-ai/langserve/pull/747
• 0.3.0.dev1 release by @eyurtsev in https://github.com/langchain-ai/langserve/pull/748
• resolve more warnings in unit tests by @eyurtsev in https://github.com/langchain-ai/langserve/pull/752
• first pass at removing deprecated usaged by @eyurtsev in https://github.com/langchain-ai/langserve/pull/751
• update claude model in examples by @eyurtsev in https://github.com/langchain-ai/langserve/pull/750
• more run time warnings by @eyurtsev in https://github.com/langchain-ai/langserve/pull/753
• Update doc-string, remove unused function by @eyurtsev in https://github.com/langchain-ai/langserve/pull/754
• update serialization to work with older pydantic versions by @eyurtsev in https://github.com/langchain-ai/langserve/pull/756
• serialization fix for defaults by @eyurtsev in https://github.com/langchain-ai/langserve/pull/757
• Release 0.3.0dev2 by @eyurtsev in https://github.com/langchain-ai/langserve/pull/758
• add ability to control version of astream events API by @eyurtsev in https://github.com/langchain-ai/langserve/pull/760
• improve error messages when models fail to hash by @eyurtsev in https://github.com/langchain-ai/langserve/pull/762
• mark include callback events as a beta api by @eyurtsev in https://github.com/langchain-ai/langserve/pull/761
• propagate astream events from add_route by @eyurtsev in https://github.com/langchain-ai/langserve/pull/763
• Fix issue with callback events sent from server by @eyurtsev in https://github.com/langchain-ai/langserve/pull/765
• Add ability to specify custom serializer by @eyurtsev in https://github.com/langchain-ai/langserve/pull/764
• v0.3 release by @eyurtsev in https://github.com/langchain-ai/langserve/pull/767

Full Changelog: https://github.com/langchain-ai/langserve/compare/v0.2.3...v0.3.0