[#63] Update LiteLLM and README to support other models (#64)

* [#63] Update LiteLLM and README to support Claude models

This change updates the LiteLLM to support the new Claude models.

* Add MISTRAL_API_KEY to environment variables

README.md

@@ -33,10 +33,12 @@ pinned: false
    CREDENTIALS_PATH=<your crednetials path> \
    MODELS_SECRET=<your secret> \
    OPENAI_API_KEY=<your key> \
+   ANTHROPIC_API_KEY=<your key> \
+   MISTRAL_API_KEY=<your key> \
    python3 app.py
    ```
 
-   Replace `<your project id>`, `<your crednetials path>`, `<your secret>`, and `<your key>` with your GCP project ID, the path to your GCP credentials file, the secret name for your models, and your OpenAI API key respectively.
+   Replace the placeholders with your actual values.
 
    > To run the app with [auto-reloading](https://www.gradio.app/guides/developing-faster-with-reload-mode), use `gradio app.py --demo-name app` instead of `python3 app.py`.
 

requirements.txt

@@ -54,7 +54,7 @@ Jinja2==3.1.3
 jsonschema==4.21.1
 jsonschema-specifications==2023.12.1
 kiwisolver==1.4.5
-litellm==1.22.3
+litellm==1.32.7
 markdown-it-py==3.0.0
 MarkupSafe==2.1.5
 matplotlib==3.8.2