.eslintrc

{
  "rules": {
    "flowtype/boolean-style": ["error", "boolean"],
    "flowtype/define-flow-type": "warn",
    "flowtype/delimiter-dangle": ["error", "never"],
    "flowtype/generic-spacing": ["error", "never"],
    "flowtype/no-primitive-constructor-types": "error",
    "flowtype/no-weak-types": "warn",
    "flowtype/object-type-delimiter": ["error", "comma"],
    "flowtype/require-parameter-type": "off",
    "flowtype/require-return-type": "off",
    "flowtype/require-valid-file-annotation": "off",
    "flowtype/semi": ["error", "always"],
    "flowtype/space-after-type-colon": ["error", "always"],
    "flowtype/space-before-generic-bracket": ["error", "never"],
    "flowtype/space-before-type-colon": ["error", "never"],
    "flowtype/union-intersection-spacing": ["error", "always"],
    "flowtype/use-flow-type": "error",
    "flowtype/valid-syntax": "error"
  }
}