Update the update config steps to manage the automated updater after the release of Varbase 9.1.8

[Natshah]

    "9.1.5": {
      "from": "9.1.5",
      "to": "9.1.8",
      "final_target_version": "~9.1.0",
      "composer-project-json-url": "9.1.8"
    },
    "9.1.6": {
      "from": "9.1.6",
      "to": "9.1.8",
      "final_target_version": "~9.1.0",
      "composer-project-json-url": "9.1.8"
    },
    "9.1.7": {
      "from": "9.1.7",
      "to": "9.1.8",
      "final_target_version": "~9.1.0",
      "composer-project-json-url": "9.1.8"
    },
    "9.1.8": {
      "from": "9.1.8",
      "to": "9.1.8",
      "final_target_version": "~9.1.0",
      "composer-project-json-url": "9.1.8"
    }