fix: add pytest-asyncio to langchain test setup

Author: constantinius

scripts/populate_tox/config.py

@@ -201,7 +201,7 @@
         "package": "langchain",
         "integration_name": "langchain",
         "deps": {
-            "*": ["openai", "tiktoken", "langchain-openai"],
+            "*": ["pytest-asyncio", "openai", "tiktoken", "langchain-openai"],
             "<=0.1": ["httpx<0.28.0"],
             ">=0.3": ["langchain-community"],
             ">=1.0": ["langchain-classic"],
@@ -214,7 +214,7 @@
         "package": "langchain",
         "integration_name": "langchain",
         "deps": {
-            "*": ["openai", "langchain-openai"],
+            "*": ["pytest-asyncio", "openai", "langchain-openai"],
             "<=0.1": ["httpx<0.28.0"],
             ">=0.3": ["langchain-community"],
             ">=1.0": ["langchain-classic"],