Update dependencies

Bump litellm to support gpt-4o @gianlucaalfa

Author: tpai

requirements.txt

@@ -2,13 +2,13 @@
 asyncio==3.4.3
 
 # progress tracking
-tqdm==4.66.1
+tqdm==4.66.4
 
 # llm adapter
-litellm==1.21.7
+litellm==1.37.9
 
 # text extraction
-trafilatura==1.8.1 
+trafilatura==1.9.0 
 
 # duckduckgo
 duckduckgo_search==5.3.0b4