Add property for latest stable React release to be used with React settings

[bennycode]

There is this warning when not specifying a React version in .eslint.js:

Warning: React version not specified in eslint-plugin-react settings. See https://github.com/yannickcr/eslint-plugin-react#configuration.

Telling from the documentation, I can see that the default is to use the latest stable React release if no version is specified. That's great because in my case I always run on the latest stable release, so the default option is what suits me best. However, there is a warning when running eslint because I have no version specified in my config.

From the implementation I can see that the default version is just set to '999.999.999', so I can fix the warning (and get the default behaviour) by adding this to my .eslint.js:

"settings": {
  "react": {
    "version": "999.999.999"
  }
}

It would be much nicer though to declare "version": "latest" instead of "version": "999.999.999".

[ljharb]

Duplicate of #1955.

[footios]

This will automatically detect the React version

"settings": {
  "react": {
    "version": "detect"
  }
}

credits to vigilantly