Reparse

[tbela99]

• Add a new css module scope 'shortest' to produce short scoped names
• fix performance issues - prevent garbage collection
• support if() css function
• @function Experimental
• validate media queries
• automatically generate range media query
• handle calc() in media features
• add at-rule() and named-feature() to support-condition syntax https://drafts.csswg.org/css-conditional-5/#changes-from-L4