message: Add types file to package.json
diff: "description": "Detect browser capabilities from a user agent string.",
  "repository": "git+https://github.com/Polymer/browser-capabilities.git",
  "main": "lib/browser-capabilities.js",
  + "types": "lib/browser-capabilities.d.ts",
  "engines": {
  "node": ">=6.0"
  },
  