(Alpha) Nested Tokens, Private Tokens, & Custom Properties

• Core:
  • NEW: $adjust-query-overlap (max | min | false)
    allows you to control if and how media-queries are adjusted
    to avoid overlap between min/max queries
    (thanks to @biw-joelschou)
  • NEW: Support for integrating accoutrement tokens & CSS variables
    with tokens--(), token--(), var-token(),
    and plugin-specific shortcuts
  • BREAKING: Token names starting with _ or -
    are considered "private" to Sass,
    and will not be output when auto-generating CSS
    (variables, font-names, etc.)
  • BREAKING: Default ratio tokens are now prefixed with _
    (search/replace e.g. minor-third -> _minor-third)
    to avoid CSS-variable output
  • NEW: is-private-token() and is-alias-for() are now public functions,
    to help with token-inspection
  • BREAKING: Support for nested-map tokens with -> syntax,
    both in #hash->references and get-token($source, 'function->calls')
    (thanks to @biw-joelschou)
• Plugin: Animate
  • BREAKING: Default easing tokens are now prefixed with _
    (search/replace e.g. in-out-quad -> _in-out-quad)
    to avoid CSS-variable output
  • NEW: Support for easing CSS variables with
    easing--(), ease--(), and var-ease()
  • NEW: Support for time CSS variables with
    times--(), time--(), and var-time()
  • NEW: Support for change CSS variables with
    changes--(), change--(), and var-change()
• Plugin: Color
  • BREAKING: _contrast-light and _contrast-dark colors are used
    for mixing tint() and shade(),
    with optional $light/$dark override parameters
    (thanks to @biw-joelschou)
  • NEW: Default _contrast-light and _contrast-dark provided,
    set _contrast-light/dark in $colors to override
  • NEW: Support for CSS Variables with
    colors--(), color--(), and var-color()
• [Plugin: Layout][layout]
  • BREAKING: Default ratio tokens are now prefixed with _,
    see core for details
• Plugin: Scale
  • BREAKING: Default ratio tokens are now prefixed with _,
    see core for details
  • NEW: Support for size CSS Variables with
    sizes--(), size--(), and var-size()
  • NEW: Support for ratio variables with
    ratios--(), ratio--(), and var-ratio()
• Plugin: Type
  • BREAKING: Non-map fonts are interpreted as font-stacks
  • BREAKING: Normalized font-data uses proper name-quotation,
    and ignores missing or private names/stacks
  • BREAKING: import-webfonts() no longer imports private fonts,
    but will import a direct alias of the private font
  • NEW: import-webfonts() accepts $source parameter
  • NEW: Support for CSS Variables with
    fonts--(), font--(), and var-font()