Dart Sass 1.0.0-alpha.5

• Fix bounds-checking for opacify(), fade-in(), transparentize(), and fade-out().
• Fix a bug with @extend superselector calculations.
• Fix some cases where #{...}-- would fail to parse in selectors.
• Allow a single number to be passed to saturate() for use in filter contexts.
• Fix a bug where **/ would fail to close a loud comment.
• Fix a bug where mixin and function calls could set variables incorrectly.
• Move plain CSS @imports to the top of the document.

Dart Sass 1.0.0-alpha.4

• Add support for bracketed lists.
• Add support for Unicode ranges.
• Add support for the Microsoft-style = operator.
• Print the filename for @debug rules.
• Fix a bug where 1 + - 2 and similar constructs would crash the parser.
• Fix a bug where @extend produced the wrong result when used with selector combinators.
• Fix a bug where placeholder selectors were not allowed to be unified.
• Fix the mixin-exists() function.
• Fix :nth-child() and :nth-last-child() parsing when they contain of selector.

Dart Sass 1.0.0-alpha.3

• Fix a bug where color equality didn't take the alpha channel into account.
• Fix a bug with converting some RGB colors to HSL.
• Fix a parent selector resolution bug.
• Properly declare the arguments for opacify() and related functions.
• Add a missing dependency on the stack_trace package.
• Fix broken Windows archives.
• Emit colors using their original representation if possible.
• Emit colors without an original representation as names if possible.

Dart Sass 1.0.0-alpha.2

• Fix a bug where variables, functions, and mixins were broken in imported files.

Dart Sass 1.0.0-alpha.1

This is the initial alpha prerelease of Dart Sass. It's not production-ready by any means, but it's complete enough for users to play around with it.