Fixeswoocommerce/woocommerce-admin#4732
This updates `@wordpress/base-styles`, and because `@wordpress/components` depends on variables from it, that must be updated as well.
There are 3 major changes required as part of updating:
1. The $theme-color variable is no longer exposed by base-styles. Instead there are 3 css vars exposed. These are made available by use of a provided mixin. Situations where $theme-color was darkened using scss have been mapped as best as possible to the 2 other darkened shades of the css var that are available such as `--wp-admin-theme-color-darker-20` and `--wp-admin-theme-color-darker-10`. In some cases this means the colors are not exactly the same as before.
2. The post css `theme()` call is no longer available. All uses of this have been consolidated to use of the main theme css var `--wp-admin-theme-color`. This means that calls like `theme(secondary)` or `theme(outline)` etc have all been consolidated to the one color.
3. Many of the variables used for different shades of gray have been deprecated. These have been mapped across to the new gray variables. (Mapped according to the list described in woocommerce/woocommerce-admin#4732)
* Add dismiss button as task list item option
* Add option to undo task dismissal
* Record modal dismissal event
* Add transition animation to list items
* Use key for list items instead of index
* Remove dismissed tasks on recompleting profiler steps
* Fix secondary button style in OBW.
* Center snackbar notices in OBW.
* Scope snackbar changes to just the OBW.
* Add busy treatment to Jetpack connect button when redirecting.
* Remove color override for form toggles in ellipsis menus.
* Fix styling of task list.
* Fix button styles in date range picker component.
* Use admin theme colors in calendar component selections.
* Fix datepicker styling on analytics settings page.
* Update List actionable items to be wrapped with Link
* Update product tasks to use href instead of onclick
* User inner tag for list items
* Fix up a11y for non-link actionable items
* Add product subtask list component
* Add has-action class to list component
* Redirect after active task completion
* Refactor task completion check
* Add task completion statuses to component settings
* Fix missing className prop for list items
* Add task completion styling
* Add task list dashboard page
* Add actual site URL to header
* Fix typos
* Remove app bar
* Use material icons
* Update material icons to use Google hosted font
* Localize description strings
Sam Seay
Joshua T Flowers
Paul Sealock
Jeff Stieler
Justin Shreve