I was getting an error on the first line/import of every file:
[eslint] Definition for rule 'react/require-extension' was not found (react/require-extension)
The docs for require-extension seem to have been removed, so is there a reason to still include this when the config already includes eslint-plugin-import?
// Restrict file extensions that may be required
// https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/require-extension.md
'react/require-extension': [2, { extensions: ['.jsx', '.js'] }],