I am trying to upgrade dateformat package which was 3.0.3 in my package.json
I have a following method which is throwing above error

  function GenerateTimestamp() {
      return dateFormat(new Date(), "yyyy-mm-dd HH:MM:ss.l");
  }

Any idea what change i required?
version of package.json I have tried are 4.x.x

My package.json is as following

{
  "name": "my.web",
  "version": "1.0.0",
  "private": true,
  "devDependencies": {
    "bootbox": "5.5.3",
    "bootstrap": "3.4.1",
    "dateformat": "3.0.3",
    "eonasdan-bootstrap-datetimepicker": "4.17.49",
    "genesys-cloud-webrtc-sdk": "9.2.0",
    "gulp": "4.0.2",
    "gulp-concat": "2.6.1",
    "gulp-clean-css": "4.3.0",
    "gulp-sass": "5.1.0",
    "sass": "1.71.1",
    "gulp-uglify": "3.0.2",
    "highcharts": "6.2.0",
    "jquery": "3.7.1",
    "jquery-ui-dist": "1.13.3",
    "jquery-validation": "1.21.0",
    "jquery-validation-unobtrusive": "4.0.0",
    "merge-stream": "2.0.0",
    "moment": "2.30.1",
    "purecloud-platform-client-v2": "204.1.0",
    "rimraf": "3.0.2",
    "@aspnet/signalr": "1.1.4",
    "url-search-params": "1.1.0",
    "uglify-js": "3.19.3",
    "yargs": "15.3.1",
    "summernote": "0.8.18"
  }
}