Don't generate node and rust bindings in subfolders tsx/ and typescript/

[mjambon]

Without this, the following extra files get generated when we run npm run build:

	tsx/Cargo.toml
	tsx/binding.gyp
	tsx/bindings/
	typescript/Cargo.toml
	typescript/binding.gyp
	typescript/bindings/

Files with such names already exist under the project's root e.g. https://github.com/tree-sitter/tree-sitter-typescript/blob/master/Cargo.toml.

I don't know what these files are for so I don't know if this PR does the right thing :-). Maybe the right behavior is instead to keep those under tsx/ and typescript/ and delete the ones under the project root?

Checklist:

• All tests pass in CI.
• There are sufficient tests for the new fix/feature.
• Grammar rules have not been renamed unless absolutely necessary.
• The conflicts section hasn't grown too much.
• The parser size hasn't grown too much (check the value of STATE_COUNT in src/parser.c).

[mjambon]

The issues of these new generated files was raised in #135 and #163

[dcreager]

👍 For this particular repo, this is absolutely the right thing to do, because we already have these bindings files in the repo root. So the new files being generated in the tsx and typescript directories are redundant with the files that already exist.

(The Cargo.toml is needed to publish the Rust crate for this parser, binding.gyp is for the npm package, and the bindings/{node,rust} directories contain their implementations.)

[resolritter]

FWIW when I tried to use --no-bindings locally on #135, I got the following:

> ../node_modules/.bin/tree-sitter generate --no-bindings
error: Found argument '--no-bindings' which wasn't expected, or isn't valid in this context

USAGE:
    tree-sitter generate [FLAGS] [OPTIONS] [grammar-path]

For more information try --help

> ../node_modules/.bin/tree-sitter --version
tree-sitter 0.19.2 (d037c4914d7845385dbf330f1a653777f81b7240)

[mjambon]

@resolritter ah, that's good to know.

Here's the relevant section from tree-sitter's git log:

commit 24785cdb39ad2740ca33c111490984333787f5d3
Author: Max Brunsfeld <[email protected]>
Date:   Mon Mar 8 16:36:59 2021 -0800

    0.19.3

commit 9e50befcf8e1b6855337b7a877aa3099947f5678
Author: Max Brunsfeld <[email protected]>
Date:   Mon Mar 8 12:02:01 2021 -0800

    For node-types.json, process supertypes in a stable order

commit 8e894ff3f1898fcaa09ae125bbd5fde8467aea42
Author: Max Brunsfeld <[email protected]>
Date:   Mon Mar 8 12:01:45 2021 -0800

    Add --no-bindings flag to generate subcommand

So we need to set a constraint on tree-sitter >= 0.19.3.

[mjambon]

I added a version constraint and also added the unwanted files to .gitignore as a precaution. Thanks @dcreager and @resolritter for your help.