Tree-sitter-ocamllex

What's Changed
* Migrate to `tree-sitter.json` by amaanq in https://github.com/314eter/tree-sitter-ocamllex/pull/6
* Update bindings by 314eter in https://github.com/314eter/tree-sitter-ocamllex/pull/7
* Update scanner by 314eter in https://github.com/314eter/tree-sitter-ocamllex/pull/8


**Full Changelog**: https://github.com/314eter/tree-sitter-ocamllex/compare/v0.20.2...v0.24.0

- Rewrite the external scanner in C (2)
- Fix quoted extensions in OCaml code and comments (tree-sitter/tree-sitter-ocaml81)
- Ignore whitespace after OCaml code (3)

- Highlight comments

- Upgrade to tree-sitter 0.20
- Add rust binding