fix: use typing.List/Tuple for Python 3.8 compatibility

Replace PEP 585 lowercase generics (list[tuple[...]]) with
typing.List[typing.Tuple[...]] to avoid TypeError on Python 3.8.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: kraenhansen

src/elevenlabs/conversational_ai/conversation.py

@@ -430,7 +430,7 @@ def _get_wss_url(self):
         # Ensure base URL ends with '/' for proper joining
         if not base_ws_url.endswith("/"):
             base_ws_url += "/"
-        params: list[tuple[str, str]] = [
+        params: List[Tuple[str, str]] = [
             ("agent_id", self.agent_id),
             ("source", "python_sdk"),
             ("version", __version__),

src/elevenlabs/realtime/scribe.py

@@ -372,14 +372,14 @@ def _build_websocket_url(
         base = self.base_url.replace("https://", "wss://").replace("http://", "ws://")
 
         # Build query parameters
-        params: list[tuple[str, str]] = [
+        params: typing.List[typing.Tuple[str, str]] = [
             ("model_id", model_id),
             ("audio_format", audio_format),
             ("commit_strategy", commit_strategy),
         ]
 
         # Add optional parameters
-        optional: list[tuple[str, typing.Any]] = [
+        optional: typing.List[typing.Tuple[str, typing.Any]] = [
             ("vad_silence_threshold_secs", vad_silence_threshold_secs),
             ("vad_threshold", vad_threshold),
             ("min_speech_duration_ms", min_speech_duration_ms),