Update: add react plugin config for eslint init

[ghost]

This add the recommended config for eslint-plugin-react when using eslint --init
doc: https://github.com/yannickcr/eslint-plugin-react#configuration

Without it, eslint detects React components and other stuff as unused vars, while they are used in jsx tags

[ljharb]

altho at this point why wouldn't react users just get the airbnb config

[ghost]

altho at this point why wouldn't react users just get the airbnb config

I never heard about it as a react beginner, I ran eslint --init in create-react-app project and then I chose react option, but many warnings about unused vars appeared to me. after searching for the problem I found that react plugin configuration is missing.

[platinumazure]

I don't know if this is technically a bug or an enhancement request, but this seems reasonable to me since we do the same sort of thing for Vue (adding plugin:vue/essential config).

[ghost]

I called it Update because I though that the recommended config was added to the plugin after the moment when the coder wrote the code.

[aladdin-add]

LGTM, thanks!