⬆️(deps): Update langchain-litellm requirement from <0.7.0,>=0.6.6 to >=0.6.6,<0.8.0 in /packages/mewbo_core

⬆️(deps): Update langchain-litellm requirement from <0.7.0,>=0.6.6 to >=0.6.6,<0.8.0 in /packages/mewbo_core #579