Adding custom helper functions or ember-truth-helpers to my Ember application

I have an Ember Application, maybe it started as Visual Studio some MVC or some project template and later they have added, now I am trying hard to add "ember-truth-helpers" in many ways like using yarn add or npm add, in any of the ways its not being added, all I am trying to do is to execute the below code:

I am getting the following error: ember.debug.js:43618 Uncaught (in promise) Error: Compile Error: eq is not a helper

And my package.json file looks as below

    {
  "name": "ims-ember",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "build": "ember build",
    "babel-preset-env": "^1.7.0",
    "lint:hbs": "ember-template-lint .",
    "babel-preset-es2016": "^6.24.1",
    "lint:js": "eslint .",
    "bootbox.js": "^4.3.0",
    "start": "JOBS=1 ember serve",
    "bootstrap": "^3.3.7",
    "test": "ember test"
  },
  "author": "",
  "license": "ISC",
  "description": "",
  "dependencies": {
    "babel-core": "^6.26.3",
    "babel-polyfill": "^6.26.0",
    "babel-preset-env": "^1.7.0",
    "babel-preset-es2016": "^6.24.1",
    "bootbox.js": "^4.3.0",
    "bootstrap": "^3.3.7",
    "bootstrap-datepicker": "^1.9.0",
    "bootstrap-hover-dropdown": "^2.2.1",
    "chosen-js": "^1.8.7",
    "datatables": "^1.10.18",
    "ember-cli-windows": "github:felixrieseberg/ember-cli-windows",
    "file-loader": "^4.2.0",
    "font-awesome": "^4.7.0",
    "gulp": "^4.0.2",
    "gulp-babel": "^8.0.0",
    "gulp-clean": "^0.4.0",
    "gulp-clean-css": "^4.2.0",
    "gulp-concat": "^2.6.1",
    "gulp-concat-sourcemap": "^1.3.1",
    "gulp-declare": "^0.3.0",
    "gulp-filter": "^6.0.0",
    "gulp-if": "^3.0.0",
    "gulp-insert": "^0.5.0",
    "gulp-less": "^4.0.1",
    "gulp-replace": "^1.0.0",
    "gulp-uglify": "^3.0.2",
    "gulp-wrap": "^0.15.0",
    "gulp-wrap-file": "^0.1.2",
    "handlebars": "^4.4.2",
    "icons-loader": "0.0.6",
    "inputmask": "^4.0.9",
    "jquery": "^3.4.1",
    "jquery-ui": "^1.12.1",
    "json-stringify-safe": "^5.0.1",
    "lightbox2": "^2.11.1",
    "loader-utils": "^1.2.3",
    "moment": "^2.24.0",
    "mssql": "^5.1.0",
    "node-sass": "^4.12.0",
    "npm": "^6.13.0",
    "popper.js": "^1.15.0",
    "rimraf": "^3.0.0",
    "sass-loader": "^8.0.0",
    "schema-utils": "^2.4.1",
    "toastr": "^2.1.4",
    "typeahead.js": "^0.11.1",
    "uglifyjs-webpack-plugin": "^2.2.0",
    "uuid": "^3.3.3"
  },
  "devDependencies": {
    "@babel/core": "^7.6.2",
    "@babel/preset-env": "^7.6.2",
    "babel-loader": "^8.0.6",
    "css-loader": "^3.2.0",
    "ember-truth-helpers": "^2.1.0",
    "install": "^0.13.0",
    "less-loader": "^5.0.0",
    "style-loader": "^1.0.0",
    "webpack": "^4.41.0",
    "webpack-cli": "^3.3.10"
  }
}

any help please?