2.0.0

• 1fc88ac major: Change to export functions that return extensions
• 3b04103 major: Change style to prefer spacious self-closing tags
• 7eede29 major: Add options.printWidth for spaces or line endings between attributes
• 06eab3c major: Remove deprecated casing of some types
• 46801b3 Add nodes to hast node type registry
• 1a95c30 Add options.tightSelfClosing for space before slash
• 1779d91 Add options.quoteSmart for attribute values
• ba751fe Add options.quote for attribute values
• f73220a 71e70ad Update docs

Full Changelog: 1.2.0...2.0.0