suppress no-undef in case of [[call]]

`$call` has been deprecated in favour of `[[call]]`.

https://github.com/facebook/flow/releases/tag/v0.75.0

```js
export type LoggerType = {|
[[call]]: typeof Logger
|};
```

The above use of `call` triggers `no-undef` error.

The issue provides a JavaScript/Flow snippet but no file or test path. Start by reproducing it with eslint-plugin-flowtype and inspect how the no-undef error is produced for [[call]]; done means that syntax no longer triggers the error, with a regression test covering the example.

Written by the indexing model from the issue text.