### Bug fixes

Fix several issues in the way forced reductions were picked, to avoid infinite reduction loops.

### New features

Add support for props and custom node names in the grammar notation.

Allow importing of props via `@external prop`.

Rule capitalization is now relevant (again), only capitalized rules appear in the tree by default.

### Breaking changes

Remove support for node tags, tag expressions, the `@tags` block, and everything else related to tags.

Replace tagged expression syntax with inline rule syntax.

Literal declarations must now go into the `@tokens` block.

The `@detectDelim` declaration must now appear at the top level.

The dash in `@external-...` syntax was dropped—`@external` is now a separate token.

External grammars that default to null must now have the word `empty` instead of `from "..."` (to resolve an ambiguity that syntax introduced).