feat: Drop support for python 3.9

feat!: Bump minimum langchain version to 1.0.0

Author: jsonbailey

packages/ai-providers/server-ai-langchain/pyproject.toml

@@ -5,13 +5,12 @@ description = "LaunchDarkly AI SDK LangChain Provider"
 authors = [{name = "LaunchDarkly", email = "dev@launchdarkly.com"}]
 license = {text = "Apache-2.0"}
 readme = "README.md"
-requires-python = ">=3.9,<4"
+requires-python = ">=3.10,<4"
 classifiers = [
     "Intended Audience :: Developers",
     "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -21,8 +20,8 @@ classifiers = [
 ]
 dependencies = [
     "launchdarkly-server-sdk-ai>=0.16.0",
-    "langchain-core>=0.2.0",
-    "langchain>=0.2.0",
+    "langchain-core>=1.0.0",
+    "langchain>=1.0.0",
 ]
 
 [project.urls]
@@ -47,7 +46,7 @@ build-backend = "hatchling.build"
 packages = ["src/ldai_langchain"]
 
 [tool.mypy]
-python_version = "3.9"
+python_version = "3.10"
 ignore_missing_imports = true
 install_types = true
 non_interactive = true