Py-lav

* Update Magma and Lavaplayer.
* Added TrackStartEvent event.
* Added retryLimit configuration option.
* Use a single AudioPlayerManager for all WS connections, reducing overhead.
* Docker images now use Zulu JDK 13 to mitigate TLS 1.3 problems.

Contributors:
[freyacodes](https://github.com/freyacodes),
[duncte123](https://github.com/duncte123),
[ByteAlex](https://github.com/ByteAlex), and
[Xavinlol](https://github.com/Xavinlol)

Officially limit Lavalink to JRE 11 and up. Magma has long been having issues with older versions.

* IP rotation system for getting around certain ratelimits.
* Update Lavaplayer to 1.3.32.
* Docker container now uses a non-root user.

Contributors:
[freyacodes](https://github.com/freyacodes),
[ByteAlex](https://github.com/ByteAlex),
[duncte123](https://github.com/duncte123), and
[james7132](https://github.com/james7132)

* Updated Lavaplayer to 1.3.19. This release includes a patch which fixes loading youtube URLs.
https://github.com/sedmelluq/lavaplayer/pull/199
* Made the WebSocket handshake return code 401 instead of 200 on bad auth. 208

Contributors:
[freyacodes](https://github.com/freyacodes) and
[Devoxin](https://github.com/Devoxin)

* Update dependencies -- fixes frequent youtube HTTP errors
* Return `FriendlyException` message on `LOAD_FAILED` 174
* Add option to disable `ytsearch` and `scsearch` 194

Contributors:
[Devoxin](https://github.com/Devoxin),
[duncte123](https://github.com/duncte123),
[freyacodes](https://github.com/freyacodes), and
[napstr](https://github.com/napstr)

* Add compatibility for Java 8-10

Contributor:
[MinnDevelopment](https://github.com/MinnDevelopment/)