message: Remove nopt and path-posix from package.json.
  Fixes
diff: "dom5": "^2.2.0",
  "espree": "^3.4.0",
  "mkdirp": "^0.5.1",
  - "nopt": "^3.0.1",
  "parse5": "^2.2.2",
  - "path-posix": "^1.0.0",
  "polymer-analyzer": "^2.0.0",
  "source-map": "^0.5.6"
  },
  