### Breaking changes

Themes are now specified differently, using plain CSS selectors extended with `$` syntax for targeting theme classes. This should make them more flexible.

The style-mod dependency has been upgraded to 3.0, which is a backward-incompatible upgrade.

The `multipleSelections` extension is no longer supported. You probably want to use `drawSelection` combined with `EditorState.allowMultipleSelections.of(true)`.

`WidgetType` no longer takes a type parameter. Implementations are now themselves responsible for creating instance variables and implementing an appropriate `eq` method.

Drops support for `PluginValue.measure` (which was very broken already in the previous release).

### Bug fixes

The editor no longer loses focus when picking a completion with the mouse.

Fix a bug that caused completion info tooltips to be positioned off-screen.

### New features

There is now an SQL language module.

The autocomplete package now exports an `ifNotIn` helper that can turn off completion sources when the cursor is in a given token type.

There is now a `lang-xml` package with basic XML support.

`ViewUpdate` objects now have a `geometryChanged` getter that tells you whether the geometry of the content changed.

The view module now exports a `drawSelection` function that creates an extension that overrides the native selection drawing.

Scroll handlers registered view `EditorView.domEventHandlers` or view plugins will now be called any time the view or an ancestor of the view is scrolled.

DOM event handlers may now return void, for convenience.

There is now a `lang-rust` package.

The view package now exports a `placeholder` function that can be used to create a placeholder shown when the editor is empty.

The editor view now has a `composing` property indicating whether IME is active.

The autocomplete package now exports `acceptCompletion` and `moveCompletionSelection` commands.