Sass deprecation warning

[joostdebruijn]

Describe the bug
Sass is throwing a depreciation warning during build time:

Deprecation Warning: $weight: Passing a number without unit % (0.8) is deprecated.

To preserve current behavior: $weight * 1%

More info: https://sass-lang.com/d/function-units

   ╷
31 │ $select-color-dropdown-border-top: mix($input-border-color, $input-bg, 0.8) !default;
   │                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   ╵
    node_modules/tom-select/src/scss/tom-select.bootstrap5.scss 31:36

To Reproduce
Do an import tom-select.bootstrap5.scss and build your project with Sass 1.56.0. The depreciation message above will be displayed.

Expected behavior
Don't receive any deprecation messages.

Additional context
It's happening with the latest release of this package: v2.2.2.

[mmarton]

same deprecation is present with BS4
@import '~tom-select/src/scss/tom-select.bootstrap4.scss';

[BariqDharmawan]

Already PR on #534 . Just have to wait owner accept the PR