v0.3 release (#767)

Author: eyurtsev

poetry.lock

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "langserve"
-version = "0.3.0dev2"
+version = "0.3.0"
 description = ""
 readme = "README.md"
 authors = ["LangChain"]
@@ -11,12 +11,11 @@ include = ["langserve/playground/dist/**/*", "langserve/chat_playground/dist/**/
 
 [tool.poetry.dependencies]
 python = "^3.9"
-httpx = ">=0.23.0" # May be able to decrease this version
+httpx = ">=0.23.0,<1.0"
 fastapi = {version = ">=0.90.1,<1", optional = true}
 sse-starlette = {version = "^1.3.0", optional = true}
 langchain-core = "^0.3"
-orjson = ">=2"
-pyproject-toml = "^0.0.10"
+orjson = ">=2,<4"
 pydantic = "^2.7"
 
 [tool.poetry.group.dev.dependencies]