Unfortunately the installtion failed with the new release.
$ pip install https://github.com/KittenML/KittenTTS/releases/download/0.8/kittentts-0.8.0-py3-none-any.whl
error: Failed to install: kittentts-0.8.0-py3-none-any.whl (kittentts==0.8.0 (from https://github.com/KittenML/KittenTTS/releases/download/0.8/kittentts-0.8.0-py3-none-any.whl))
Caused by: Wheel version does not match filename: 0.1.0 != 0.8.0
Unfortunately the installtion failed with the new release.