message: add dependency on qs, which is used by utils/HostingLink.js
diff: "pako": "^1.0.5",
  "prop-types": "^15.5.8",
  "qrcode-react": "^0.1.16",
  + "qs": "^6.6.0",
  "querystring": "^0.2.0",
  "react": "^15.6.0",
  "react-addons-css-transition-group": "15.3.2",
  