.eslintrc

{
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 8,
    "sourceType": "module"
  },
  "plugins": ["flowtype", "prettier", "jest"],
  "env": {
    "node": true,
    "es6": true,
    "jest/globals": true
  },
  "rules": {
    "no-duplicate-imports": "error",
    "no-undef": "error",
    "no-unused-vars": "error",
    "no-else-return": "error",
    "flowtype/define-flow-type": 1,
    "flowtype/use-flow-type": 1,
    "jest/no-disabled-tests": "warn",
    "jest/no-focused-tests": "error",
    "jest/no-identical-title": "error",
    "jest/valid-expect": "error",
    "prettier/prettier": [
      "error",
      {
        "trailingComma": "es5",
        "singleQuote": true,
        "bracketSpacing": true,
        "tabWidth": 2,
        "printWidth": 100
      }
    ]
  },
  "settings": {
    "flowtype": {
      "onlyFilesWithFlowAnnotation": false
    }
  }
}