Configuração do ESLint e EditorConfig para uso com o CRA

.editorconfig

root = true

[*]
indent_style = space
indent_size = 2
charset = utf-8
trim_trailing_whitespace = true
insert_final_newline = true

.eslintrc

{
  "parser": "babel-eslint",
  "extends": "airbnb",
  "env": {
    "browser": true,
    "jest": true
  },
  "plugins": ["react", "jsx-a11y", "import"],
  "rules": {
    "react/jsx-filename-extension": [
      "error",
      {
        "extensions": [".js", ".jsx"]
      }
    ],
    "global-require": "off",
    "import/prefer-default-export": "off",
    "react/jsx-one-expression-per-line": "off"

  }
}

gistfile1.txt

yarn add eslint-config-airbnb eslint-plugin-import eslint-plugin-jsx-a11y eslint-plugin-react -D