Update CHANGELOG
Add todo comment
Tests: Remove previous benchmark tests
Tests: Add benchmark tests w/ PostCSS and Gonzales
AST: New object model for CSS syntax
Use child types
Remove needInfo
Misc changes: Tokenizer
Always pass token position to `throwError`
Use child types
Less: Update tests
Less: Always pass token position to `throwError`
Less: Update rules to pass tests
Update tests
Remove unused files