Refactor building wheels (k2-fsa#436)

Refactor building wheels (k2-fsa#436)

Add Python APIs for WeNet CTC models (k2-fsa#428)

Support VITS TTS models from coqui-ai/TTS (k2-fsa#416)

* Support VITS TTS models from coqui-ai/TTS

* release v1.8.9

Release v1.8.8 (k2-fsa#414)

Support French in TTS (k2-fsa#397)

Release v1.8.6 (k2-fsa#391)

Fix splitting utf8 string into words (k2-fsa#385)

Add Go API for TTS (k2-fsa#377)

Release v1.8.3 (k2-fsa#370)