chore(langchain): remove upper bound at v1 for core (#32737)

Author: sydney-runkle

libs/langchain_v1/pyproject.toml

@@ -7,14 +7,14 @@ authors = []
 license = { text = "MIT" }
 requires-python = ">=3.10"
 dependencies = [
-    "langchain-core<1.0.0,>=0.3.75",
+    "langchain-core<2.0.0,>=0.3.75",
     "langchain-text-splitters<1.0.0,>=0.3.9",
     "langgraph>=0.6.0",
     "pydantic>=2.7.4",
 ]
 
 name = "langchain"
-version = "1.0.0a1"
+version = "1.0.0a2"
 description = "Building applications with LLMs through composability"
 readme = "README.md"