message: Update version of dom5 to fix undefined function
  `dom5` 2.1.0 introduced a new function `defaultChildNodes` which is used in the `polymer/dom-module-scanner` per
  However the dependency was not updated in `package.json`, meaning that an installation of `polymer-analyzer` might fail and resolve the incorrect version of `dom5`.
diff: "clone": "^2.0.0",
  "cssbeautify": "^0.3.1",
  "doctrine": "^2.0.0",
  - "dom5": "^2.0.0",
  + "dom5": "^2.1.0",
  "escodegen": "^1.7.0",
  "espree": "^3.1.7",
  "estraverse": "^3.1.0",
  