As reported by @Iron-Ham.

@Ironham notes that it seems jarring to see an init and then deinit method declared in succession where only one gets a special highlighting.

Copied from nvim-treesitter/nvim-treesitter#6242

Indent tests were not copied because I could not find a way to invoke
them from `tree-sitter test`. We'll just have to be more careful in the
future.

Create a separate identifier for constructors

* Loosen tree-sitter dependency versions

`tree-sitter` has released changes that are breaking within its library
itself, but that do not bump the ABI_VERSION. This means that although
the `tree-sitter` "major version" has changed, this is compatible across
major versions.