Error when Angular app is building

NOTE: package.json

{
  "name": "front",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@agm/core": "1.0.0",
    "@angular/animations": "8.2.6",
    "@angular/cdk": "8.2.1",
    "@angular/common": "8.2.5",
    "@angular/compiler": "8.2.5",
    "@angular/core": "8.2.5",
    "@angular/forms": "8.2.5",
    "@angular/material": "8.2.1",
    "@angular/material-moment-adapter": "8.2.3",
    "@angular/platform-browser": "8.2.5",
    "@angular/platform-browser-dynamic": "8.2.5",
    "@angular/router": "8.2.5",
    "@fortawesome/angular-fontawesome": "0.5.0",
    "@fortawesome/fontawesome-svg-core": "1.2.23",
    "@fortawesome/free-brands-svg-icons": "5.11.0",
    "@fortawesome/free-regular-svg-icons": "5.11.1",
    "@fortawesome/free-solid-svg-icons": "5.11.0",
    "@ng-idle/core": "^10.0.0-beta.1",
    "@ng-idle/keepalive": "^10.0.0-beta.1",
    "@ngx-formly/bootstrap": "^5.0.0",
    "@ngx-formly/core": "^5.0.0",
    "@ngx-formly/material": "^5.9.3",
    "@ngx-formly/schematics": "^5.9.3",
    "@ngx-translate/core": "12.1.2",
    "@ngx-translate/http-loader": "4.0.0",
    "angular2-ladda": "2.0.2",
    "angular2-moment": "^1.9.0",
    "angular2-text-mask": "9.0.0",
    "bootstrap": "4.3.1",
    "classlist.js": "1.1.20150312",
    "hammerjs": "2.0.8",
    "moment": "2.24.0",
    "ng-recaptcha": "5.0.0",
    "ngx-device-detector": "2.0.0",
    "ngx-plaid-link": "1.0.2",
    "rxjs": "6.4.0",
    "text-mask-addons": "3.8.0",
    "tslib": "1.10.0",
    "vanilla-text-mask": "5.1.1",
    "web-animations-js": "2.3.2",
    "zone.js": "0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "0.803.3",
    "@angular/cli": "8.3.3",
    "@angular/compiler-cli": "8.2.5",
    "@angular/language-service": "8.2.5",
    "@types/google.analytics": "0.0.40",
    "@types/jasmine": "3.3.16",
    "@types/jasminewd2": "2.0.6",
    "@types/node": "8.9.5",
    "codelyzer": "5.1.0",
    "jasmine-core": "3.4.0",
    "jasmine-spec-reporter": "4.2.1",
    "karma": "4.1.0",
    "karma-chrome-launcher": "2.2.0",
    "karma-coverage-istanbul-reporter": "2.0.6",
    "karma-jasmine": "2.0.1",
    "karma-jasmine-html-reporter": "1.4.2",
    "protractor": "5.4.2",
    "ts-node": "7.0.1",
    "tslint": "5.15.0",
    "typescript": "3.5.3"
  }
}

Describe the bug Error when angular app is building ERROR in ../../node_modules/@ng-idle/core/lib/eventtargetinterruptsource.d.ts:29:9 - error TS1086: An accessor cannot be declared in an ambient context. get options(): EventTargetInterruptOptions;

To Reproduce ng build --configuration=dev

Please tell us about your environment

Mobile or Desktop: Desktop
Browser: Chrome 86.0.4240.198
Angular version: 8
NodeJS version: 10.16.0
Language (TypeScript x.x, ES5, ES2015, etc.): TypeScript

moribvndvs / ng2-idle

Error when Angular app is building #146