.strapi-updater.json file appeared

{
  "name": "strapi-updater.json",
  "version": "2.2.2",
  "description": "A file created by the Strapi updater service to keep track of your project's current version, and allow the auto-updater to properly update your project.",
  "dependencies": {
    "strapi-admin": "2.2.2",
    "strapi-core": "2.2.2",
    "strapi-hook": "2.2.2"
  }
}

This file is created by the Strapi updater service whenever a new version of the Strapi framework is released. The purpose of this file is to keep track of your project's current version, and allow the auto-updater to properly update your project. The `name` field is just the name of the file. The `version` field indicates what version of the Strapi framework your project is currently on. The `dependencies` field contains the information of the Strapi framework dependencies that your project uses, such as `strapi-admin`, `strapi-core`, and `strapi-hook`. Whenever you want to upgrade your project to the latest version of the Strapi framework, all you need to do is run the `strapi update` command. This will check your project's version against the latest version of the Strapi framework, and if there is a newer version available, it will automatically update your project accordingly.