1.0.0-alpha-99

Released on tbd.

• Updated to use AngleSharp 1.0
• Updated media parsing to media L4 spec (#133)
• Fixed issue when updating shorthands with invalid values (#129)
• Fixed issue with appended EOF character in CssText (#123)
• Fixed missing semicolon in @page rule (#135)
• Fixed integer serialization of keyframe stops (#128)
• Fixed ordering of rows and columns in grid and grid-gap (#137)
• Fixed inclusion of CSS from stylesheets (#116, #140)
• Added further compactification of CSS tuples (#89, #93)
• Added support for 8-digit hex color codes (#132)
• Added more CSSOM possibilities and helpers (#6)
• Added parts of recent color spec update such as rgb with spaces (#131)
• Added now Color L4 parsing with hsl, hwb, lab, lch, oklab, and oklch