fluent-syntax 0.11.0

• Add BaseNode.equals and BaseNode.clone. (#172)

  The new BaseNode methods can be used to compare two nodes and to create
  a deep copy of an AST node.

• Add Visitor and Transformer. (#172)

  Add two new exports: Visitor for read-only iteration over AST trees,
  and Transformer for in-place mutation of AST trees.

• Export serializeExpression and serializeVariantKey. (#350)

  The FluentSerializer.serializeExpression method has been removed in
  favor of a module-wide stateless function serializeExpression.