fluent-syntax 0.10.0 (September 24, 2020)

• Refactored AST to be generic over S which enables sliced, or owned ASTs.
• Simplified the AST to get it closer to reference AST.
• Refactored the parser to be composable.
• Moved serde derives onto AST nodes behind serde optional feature.
• Around 8-10% performance improvement on parsing "browser" and "preferences" contexts.