Dart-sass

JS API

* Fix a bug where the `logger` option was ignored for the `render()` function.

* Improve performance.

* Improve the error message when the default namespace of a `use` rule is not
a valid identifier.

* No user-visible changes.

JS API

* Add support for the `logger` option. This takes an object that can define
`warn` or `debug` methods to add custom handling for messages emitted by the
Sass compiler. See [the JS API docs] for details.

[the JS API docs]: https://sass-lang.com/documentation/js-api/interfaces/Logger

* Add a `Logger.silent` object that can be passed to the `logger` option to
silence all messages from the Sass compiler.

* Fix a bug where Sass variables and function calls in calculations weren't
being resolved correctly if there was a parenthesized interpolation elsewhere
in the file.