New features

Node.js users can now use the AudioConfig.fromWavFileInput API. This addresses GitHub issue #252.
Added two new output audio formats with WebM container for TTS (Webm16Khz16BitMonoOpus and Webm24Khz16BitMonoOpus). These are better formats for streaming audio with the Opus codec. documentation
Added VisemeReceived event for TTS/speech synthesis to return synchronous viseme animation. See documentation here.
Added BookmarkReached event for TTS. You can set bookmarks in the input SSML and get the audio offsets for each bookmark. See documentation here.

Bug fixes

Large WAV file headers are now parsed correctly (increases header slice to 512 bytes). This addresses GitHub issue #962.
Corrected microphone timing issue if mic stream ends before stop recognition, addressing an issue with Speech Recognition not working in Firefox.
We now correctly handle initialization promise when the browser forces mic off before turnOn completes.
We replaced url dependency with url-parse. This addresses GitHub issue #264.