no-flow-fix-me-comments not working

.eslintrc

module.exports = {
  env: {
    browser: true,
    es6: true,
  },
  parser: 'babel-eslint',
  extends: ["plugin:flowtype/recommended"],
  parserOptions: {
    ecmaFeatures: {
      experimentalObjectRestSpread: true,
      jsx: true,
    },
    sourceType: 'module',
  },
  plugins: ['flowtype'],
  rules: {
    'flowtype/no-dupe-keys': 'error',
    'flowtype/no-flow-fix-me-comments': 'error',
    'flowtype/delimiter-dangle': ['error', 'always']
  },
};

package.json

{
  "scripts": {
    "lint": "eslint . && echo \"eslint: no lint errors\""
  },
  "author": "vsi",
  "devDependencies": {
    "@babel/core": "^7.0.0-beta.37",
    "babel-eslint": "^8.2.1",
    "eslint": "^4.16.0",
    "eslint-plugin-flowtype": "^2.42.0"
  },
  "dependencies": {}
}

test.js

/* @flow */
'use strict';

type DupKeys = {
  a: number,
  b: string,
  a: number
}

const x: number = 42;

function foo(p: string): void {}

// $FlowFixMe
foo(x);