[ANN] Supercollider 3.9 is released

[shimpe]

In 3.9.0, determined contributors have fixed some of SuperCollider's major cross-platform compatibility
demons, addressed longstanding issues in the IDE and language, and added
new features and bugfixes across the board.

The full changelog is very long. You can read it here:
https://github.com/supercollider/superc ... ANGELOG.md

Here are the most important changes:

- Breaking change: The application binary interface (ABI) for server
plugins has changed. This has an important impact: plugin binaries
compiled for SuperCollider 3.8 will not work with SuperCollider 3.9 and
vice versa. You will need to use a new version of sc3-plugins as well if
you are upgrading SC.
- Breaking change: Rests in the patterns system have been restructured.
Instead of using the isRest event property, events are considered rests
if one of their properties is a Rest object. You must use instances of
Rest rather than the rest class itself -- use of Rest instead of Rest()
is now deprecated.
- The UnitTest quark has been incorporated into the main repository. If
you already have UnitTest installed, you should uninstall it to prevent
duplicate class errors.
- Support for multiple sclang clients connecting to the same server is
greatly improved.
- A new UGen, Sanitize, replaces infinities, NaNs, and subnormals with
another signal, zero by default.
- Fixed numerous instances of UGens outputting an initial sample of
garbage.
- Fixed help files failing to open on Windows if the user's name
contains a non-ASCII character.
- New aliases for done actions, e.g. "Done.freeSelf == 2", are
introduced for better readability. See the Done helpfile for details.
- Deprecated OSCresponder, OSCresponderNode, OSCpathResponder, AudioIn,
and Speech.
- Some Linux systems had unreadable font colors in the autocomplete
tooltips. This has been (finally) fixed.

You can grab the latest version from the release page:
https://github.com/supercollider/superc ... sion-3.9.0

The newest sc3-plugins is also available here:
https://github.com/supercollider/sc3-pl ... sion-3.9.0