Update extension

[Luciano]

I am trying to update my chrome extension version from 2.1 to 2.2, but it returns with a invalid version error message and also ask to check manifest documentation. 

As I have done this a lot of times before and the manifest is the same of earliers versions, I have no idea how to fix it. 

Follow my manifest:

{

  "manifest_version": 2,

  "name": "Bizut",

  "description": "Extensão para cadastro de candidatos",

  "version": "2.2",

  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",

  "content_scripts": [

    {

      "matches": ["<all_urls>"],

      "js": ["js/content.js"]

    }

  ],

  "background": {

    "scripts": ["js/background.js"]

  },

  "page_action" :

  {

    "default_icon" : "img/icon16_black.png",

    "default_title" : "Clique aqui para escolher a vaga",

    "default_popup": "popup.html"

  },

  "permissions" : [

    "tabs",

    "http://*/*",

    "https://*/*"

  ]

}