Librespot

Added
- Added HTTP and SOCKS proxy support with authentication (172)
- Added `logLevel` option (171)
- Added support for requesting token with multiple scopes (8c637169df1ca699abfc42ee49e9c67a11c86cb8)
- Added `connectionDropped` and `connectionEstablished` events (172, 9c9842a743d30a16a95992f69595b1bd439a1d71)

Fixed
- Fixed deadlock when track loading fails (c014f947eac1cdc66a1b365573ca815204cd678a)

Changed
- Changed response codes for API requests (172, 9c9842a743d30a16a95992f69595b1bd439a1d71)

Added
- Added search and tokens endpoints (ba8b2fb46352b7b92e8f785efa42a5f58459397b)
- Added `playlist` metadata endpoints (168)

Fixed
- Fixed synchronization issue when reading from stream (93fffc45ddd22b1111a40e58639706c33f7d817f)

Changed
- Do not include generate protobuf files, only definitions (170)

Added
- Add CORS headers to API responses (161)
- Added timeout to Mercury requests to avoid deadlocks (1e8255bfac4c360f61712eca3da76fe90a49be84)
- Added `trackTime` to API events (9a8a515bbebce17a68142c35242f0a9d38c13254)
- Added `metadataAvailable`, `playbackHaltStateChanged`, `sessionCleared`, `sessionChanged`, `inactiveSession` events (5cfae00dfdd3fade92934c4504de6ac5268be1d4, b933939e165f4a76cc9c9cd65fb4f6d9f283d3a6)
- API server is available immediately even for Zeroconf instances (166, b933939e165f4a76cc9c9cd65fb4f6d9f283d3a6)

Changed
- Updated client version and type (b4d6476f49c81dc7db8f6d2c22bd7ead0a2a0095)
- Improved download retry strategy (163, fcd47e2ee0f8774a6adc8da4149339714d498e51)
- Moved API configuration (`api.port` and `api.host`) to file (1c9a221221df0549d45003f96d4ca31297d7746f)
- Modified `player/current` endpoint to include `trackTime` parameter (9a8a515bbebce17a68142c35242f0a9d38c13254)

Fixed
- Do not shuffle mixed playlists if not allowed (2e35d9bf74f12a417302a9b1ea43ab72c7cd7b1d)
- Fixed NTP UDP socket timeout (4e5c5749039f98346f2f7fa0c4cded84b98d064d)
- Fixed official client not working after disconnecting (165)
- Update time (`pcm_offset` in Vorbis codec) when seeking (553fa315663279754e0f5d19d1012073dc6d8bd3)
- Fixed pausing state being overridden in some cases (651d6d78e10773103867131660a746669def74ea)

Added
- Websocket API to listen to player events
- Ability to change the API port via `api.port`
- Retry request when Spotify sends 503

Changed
- Fixed deadlocks
- Fixed synchronization issue


Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html) since v0.2.0.

major departure from the old API and although it brings many exciting new
things, it is also likely to introduce new bugs and some regressions.

Long story short, this v0.4.2 release is the most stable that librespot has yet
to offer. But, unless anything big comes up, it is also intended as the last
release to be based on the old API. Happy listening.

Changed
- [playback] `pipe`: Better error handling
- [playback] `subprocess`: Better error handling

Added
- [core] `apresolve`: Blacklist ap-gew4 and ap-gue1 access points that cause channel errors
- [playback] `pipe`: Implement stop

Fixed
- [main] fix `--opt=value` line argument logging
- [playback] `alsamixer`: make `--volume-ctrl fixed` work as expected when combined with `--mixer alsa`