Replace deprecated darken() and lighten() sass functions

[dkniffin]

I have upgraded my app to use dartsass, and I started getting these deprecation warnings:

css             | Deprecation Warning: Global built-in functions are deprecated and will be removed in Dart Sass 3.0.0.
css             | Use color.adjust instead.
css             |
css             | More info and automated migrator: https://sass-lang.com/d/import
css             |
css             |    ╷
css             | 10 │ $simple-switch-disable-color: lighten($simple-switch_color, 30%) !default;
css             |    │                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
css             |    ╵
css             |     a-simple-switch/src/sass/SimpleSwitch.scss 10:31                 @import
css             |
css             | Deprecation Warning: lighten() is deprecated. Suggestions:
css             |
css             | color.scale($color, $lightness: 47.6635514019%)
css             | color.adjust($color, $lightness: 30%)
css             |
css             | More info: https://sass-lang.com/d/color-functions
css             |
css             |    ╷
css             | 10 │ $simple-switch-disable-color: lighten($simple-switch_color, 30%) !default;
css             |    │                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
css             |    ╵
css             |     a-simple-switch/src/sass/SimpleSwitch.scss 10:31                 @import

There's a similar one for darken.

[ava-cassiopeia]

Ah thanks for the heads up! I think I'll just use base CSS for this one instead of SASS — I've really been enjoying color-mix() in the SASS I write for my job, and it's pretty well supported.

[ava-cassiopeia]

Okay the fix for this should be available in v0.9.2, please let me know if you have any issues and feel free to reopen if that's the case!

[dkniffin]

@ava-cassiopeia that resolved it. Thank you!