Merge pull request #1839 from pipecat-ai/mb/cartesia-speed

Add support for Cartesia's speed parameter, update clients and APIs, deprecate emotion

CHANGELOG.md

@@ -64,12 +64,24 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- The API version for `CartesiaTTSService` and `CartesiaHttpTTSService` has
+  been updated. Also, the `cartesia` dependency has been updated to 2.x.
+
+- `CartesiaTTSService` and `CartesiaHttpTTSService` now support Cartesia's new
+  `speed` parameter which accepts values of `slow`, `normal`, and `fast`.
+
 - `GeminiMultimodalLiveLLMService` now uses the user transcription and usage
   metrics provided by Gemini Live.
 
 - `GoogleLLMService` has been updated to use `google-genai` instead of the
   deprecated `google-generativeai`.
 
+### Deprecated
+
+- In `CartesiaTTSService` and `CartesiaHttpTTSService`, `emotion` has been
+  deprecated by Cartesia. Pipecat is following suit and deprecating `emotion`
+  as well.
+
 ### Removed
 
 - Since `GeminiMultimodalLiveLLMService` now transcribes it's own audio, the