[tts.picovoice] Adapted to the new orca.synthesize API.

The new API no longer returns a list of numeric values alone. Instead,
it returns a tuple where the first element is the raw audio, and the
second element contains extra info on the rendered phonemes.

platypush/plugins/tts/picovoice/__init__.py

@@ -178,7 +178,7 @@ class TtsPicovoicePlugin(TtsPlugin):
         self._play_audio(
             orca=orca,
             pcm=np.array(
-                orca.synthesize(text, speech_rate=speech_rate),
+                orca.synthesize(text, speech_rate=speech_rate)[0],
                 dtype='int16',
             ),
         )