3.0.0 - Rule update and new linter updates.

Breaking

• Replace unit-blacklist with unit-disallowed-list. unit-blacklist was deprecated in stylelint v13.7.0.

Added

• Upgraded dependency:
  • stylelint-plugin-backpack to 1.1.0
    • Adds new backpack/use-colors and backpack/use-tokens rules
  • eslint-config-skyscanner to 8.0.0