* Added the NVDA voice variants.
* Do not crash if `espeak_SetPunctuationList` is called with a NULL
punctuation list.
* Fix a segfault in `GetTranslatedPhonemeString`.
new languages:
* om (Oromo)
build:
* Support the `--with-async` configure option.
* Support the `--with-sonic` configure option.
* Support the `--with-mbrola` configure option.
* Support the `--with-klatt` configure option.
* Support the `--with-sada` configure option.
* More build improvements.