deps: add acorn stage-3 plugins

This adds bigint, class-fields, numeric-separators, static-class
features, private class methods and fields as dependency. That way
it's possible to use these in combination with acorn to parse these
language features.

This also removes a couple of files that were not necessary for
Node.js to reduce the code base.

PR-URL: https://github.com/nodejs/node/pull/27400
Refs: https://github.com/nodejs/node/issues/27391
Refs: https://github.com/nodejs/node/issues/25835
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/deps/acorn-plugins/acorn-private-methods/README.md b/deps/acorn-plugins/acorn-private-methods/README.md
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+# Private methods and getter/setters support for Acorn
+
+[![NPM version](https://img.shields.io/npm/v/acorn-private-methods.svg)](https://www.npmjs.org/package/acorn-private-methods)
+
+This is a plugin for [Acorn](http://marijnhaverbeke.nl/acorn/) - a tiny, fast JavaScript parser, written completely in JavaScript.
+
+It implements support for private methods, getters and setters as defined in the stage 3 proposal [Private methods and getter/setters for JavaScript classes](https://github.com/tc39/proposal-private-methods). The emitted AST follows [an ESTree proposal](https://github.com/estree/estree/pull/180).
+
+## Usage
+
+This module provides a plugin that can be used to extend the Acorn `Parser` class:
+
+```javascript
+const {Parser} = require('acorn');
+const privateMethods = require('acorn-private-methods');
+Parser.extend(privateMethods).parse('class X { #a() {} }');
+```
+
+## License
+
+This plugin is released under an [MIT License](./LICENSE).