tools: move eslint from tools to tools/node_modules

This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.

Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 72 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/vfile-location/readme.md b/tools/node_modules/eslint/node_modules/vfile-location/readme.md
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+# vfile-location [![Build Status][travis-badge]][travis] [![Coverage Status][codecov-badge]][codecov]
+
+Convert between positions (line and column-based) and offsets
+(range-based) locations in a [virtual file][vfile].
+
+## Installation
+
+[npm][]:
+
+```bash
+npm install vfile-location
+```
+
+## Usage
+
+```js
+var vfile = require('vfile');
+var vfileLocation = require('vfile-location');
+var location = vfileLocation(vfile('foo\nbar\nbaz'));
+
+location.toOffset({line: 3, column: 3}); //=> 10
+location.toPosition(offset); //=> {line: 3, column: 3, offset: 10}
+```
+
+## API
+
+### `location = vfileLocation(doc)`
+
+Get transform functions for the given `doc` (`string`) or
+[`file`][vfile].
+
+Returns an object with [`toOffset`][to-offset] and
+[`toPosition`][to-position].
+
+### `location.toOffset(position)`
+
+Get the `offset` (`number`) for a line and column-based
+[`position`][position] in the bound file.  Returns `-1`
+when given invalid or out of bounds input.
+
+### `location.toPosition(offset)`
+
+Get the line and column-based [`position`][position] for `offset` in
+the bound file.
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[travis-badge]: https://img.shields.io/travis/vfile/vfile-location.svg
+
+[travis]: https://travis-ci.org/vfile/vfile-location
+
+[codecov-badge]: https://img.shields.io/codecov/c/github/vfile/vfile-location.svg
+
+[codecov]: https://codecov.io/github/vfile/vfile-location
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[license]: LICENSE
+
+[author]: http://wooorm.com
+
+[vfile]: https://github.com/vfile/vfile
+
+[to-offset]: #locationtooffsetposition
+
+[to-position]: #locationtopositionoffset
+
+[position]: https://github.com/syntax-tree/unist#position