fix: Update litellm dependency to >=1.65.1 to resolve httpx version conflicts

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/test_dependency_compatibility.py

@@ -0,0 +1,48 @@
+import importlib.util
+import sys
+import pytest
+
+
+def test_httpx_litellm_compatibility():
+    """Test that litellm is compatible with the latest httpx"""
+    import httpx
+    import litellm
+    
+    assert hasattr(httpx, "__version__")
+    
+    print(f"Using httpx version: {httpx.__version__}")
+    print("Successfully imported litellm")
+
+
+def test_exa_py_compatibility():
+    """Test that exa-py can be imported alongside litellm"""
+    if importlib.util.find_spec("exa") is None:
+        pytest.skip("exa-py not installed")
+    
+    import exa
+    import litellm
+    import httpx
+    
+    assert hasattr(exa, "__version__")
+    assert hasattr(httpx, "__version__")
+    
+    print(f"Using exa-py version: {exa.__version__}")
+    print("Successfully imported litellm")
+    print(f"Using httpx version: {httpx.__version__}")
+
+
+def test_google_genai_compatibility():
+    """Test that google-genai can be imported alongside litellm"""
+    if importlib.util.find_spec("google.generativeai") is None:
+        pytest.skip("google-genai not installed")
+    
+    from google import generativeai
+    import litellm
+    import httpx
+    
+    assert hasattr(generativeai, "version")
+    assert hasattr(httpx, "__version__")
+    
+    print(f"Using google-genai version: {generativeai.version}")
+    print("Successfully imported litellm")
+    print(f"Using httpx version: {httpx.__version__}")