feat: change references parameter to Optional in TTS methods

Signed-off-by: James Ding <[email protected]>

Author: twangodev

src/fishaudio/resources/tts.py

@@ -60,7 +60,7 @@ def convert(
         *,
         text: str,
         reference_id: Optional[str] = None,
-        references: List[ReferenceAudio] = [],
+        references: Optional[List[ReferenceAudio]] = None,
         config: TTSConfig = TTSConfig(),
         model: Model = "s1",
         request_options: Optional[RequestOptions] = None,
@@ -138,7 +138,7 @@ def stream_websocket(
         text_stream: Iterable[Union[str, TextEvent, FlushEvent]],
         *,
         reference_id: Optional[str] = None,
-        references: List[ReferenceAudio] = [],
+        references: Optional[List[ReferenceAudio]] = None,
         config: TTSConfig = TTSConfig(),
         model: Model = "s1",
         max_workers: int = 10,
@@ -251,7 +251,7 @@ async def convert(
         *,
         text: str,
         reference_id: Optional[str] = None,
-        references: List[ReferenceAudio] = [],
+        references: Optional[List[ReferenceAudio]] = None,
         config: TTSConfig = TTSConfig(),
         model: Model = "s1",
         request_options: Optional[RequestOptions] = None,
@@ -329,7 +329,7 @@ async def stream_websocket(
         text_stream: AsyncIterable[Union[str, TextEvent, FlushEvent]],
         *,
         reference_id: Optional[str] = None,
-        references: List[ReferenceAudio] = [],
+        references: Optional[List[ReferenceAudio]] = None,
         config: TTSConfig = TTSConfig(),
         model: Model = "s1",
     ):