Bump langchain version + add required pck to run

gtracer · gtracer · commit 15bccf808663 · 2023-02-10T10:47:36.000Z
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,5 @@
-langchain==0.0.58
+langchain==0.0.81
+tiktoken
 openai
 faiss-cpu
 streamlit
