v5.4.0

Improvements

• Restucture atRule analysis to improve memory usage for large files and make it more consistent with recent changes f7e30c6
• Remove an obsolete variable, slightly improving memory usage 932774a
• Replace many calls to Object.assign with assign after const assign = Object.assign, improving bundled output size (4.8kB -> 4.7kB) 3c39408

Chores

• Remove obsolete benchmark and watchlist devDependencies d2068ab