message: Add npm script for Vagrant
diff: "update-webdriver": "webdriver-manager update",
  "preprotractor": "npm run update-webdriver",
  "protractor": "node test/e2eTests.js",
  - "stryker": "stryker run stryker.client-conf.js"
  + "stryker": "stryker run stryker.client-conf.js",
  + "vagrant": "cd vagrant && vagrant up"
  },
  "engines": {
  "node": "~4 ~6 ~8"
  