diff --git a/addons/auth/.ember-cli b/addons/auth/.ember-cli
index 4ccb4bf43..8c1812cff 100644
--- a/addons/auth/.ember-cli
+++ b/addons/auth/.ember-cli
@@ -8,8 +8,8 @@
   "disableAnalytics": false,
 
   /**
-  Setting `isTypeScriptProject` to true will force the blueprint generators to generate TypeScript
-  rather than JavaScript by default, when a TypeScript version of a given blueprint is available.
+    Setting `isTypeScriptProject` to true will force the blueprint generators to generate TypeScript
+    rather than JavaScript by default, when a TypeScript version of a given blueprint is available.
   */
   "isTypeScriptProject": false
 }
diff --git a/addons/auth/.eslintrc.js b/addons/auth/.eslintrc.js
index 3db4ad9b5..6da8dfce7 100644
--- a/addons/auth/.eslintrc.js
+++ b/addons/auth/.eslintrc.js
@@ -9,12 +9,14 @@ module.exports = {
   root: true,
   parser: '@babel/eslint-parser',
   parserOptions: {
-    ecmaVersion: 2018,
+    ecmaVersion: 'latest',
     sourceType: 'module',
     // This is specific babel-config. If grows consider creating a babel config file
     requireConfigFile: false,
     babelOptions: {
-      plugins: [['@babel/plugin-proposal-decorators', { legacy: true }]],
+      plugins: [
+        ['@babel/plugin-proposal-decorators', { decoratorsBeforeExport: true }],
+      ],
     },
     // end of babel-config
   },
@@ -51,8 +53,7 @@ module.exports = {
         browser: false,
         node: true,
       },
-      plugins: ['node'],
-      extends: ['plugin:node/recommended'],
+      extends: ['plugin:n/recommended'],
     },
     {
       // Test files:
diff --git a/addons/auth/.npmignore b/addons/auth/.npmignore
index 3aac2443f..38a2b0863 100644
--- a/addons/auth/.npmignore
+++ b/addons/auth/.npmignore
@@ -22,7 +22,6 @@
 /.travis.yml
 /.watchmanconfig
 /bower.json
-/config/ember-try.js
 /CONTRIBUTING.md
 /ember-cli-build.js
 /testem.js
diff --git a/addons/auth/ember-cli-build.js b/addons/auth/ember-cli-build.js
index c3295d86d..96c422999 100644
--- a/addons/auth/ember-cli-build.js
+++ b/addons/auth/ember-cli-build.js
@@ -9,7 +9,7 @@ const EmberAddon = require('ember-cli/lib/broccoli/ember-addon');
 const { maybeEmbroider } = require('@embroider/test-setup');
 
 module.exports = function (defaults) {
-  let app = new EmberAddon(defaults, {
+  const app = new EmberAddon(defaults, {
     'ember-simple-auth': {
       // https://github.com/mainmatter/ember-simple-auth/blob/master/guides/upgrade-to-v4.md#call-sessionsetup-method-in-your-applicationroute
       useSessionSetupMethod: true,
diff --git a/addons/auth/package.json b/addons/auth/package.json
index 67bedfaca..809021808 100644
--- a/addons/auth/package.json
+++ b/addons/auth/package.json
@@ -8,8 +8,8 @@
     "ember-addon"
   ],
   "scripts": {
-    "lint": "npm-run-all --aggregate-output --continue-on-error --parallel \"lint:!(fix)\"",
-    "lint:fix": "npm-run-all --aggregate-output --continue-on-error --parallel lint:*:fix",
+    "lint": "concurrently \"npm:lint:*(!fix)\" --names \"lint:\"",
+    "lint:fix": "concurrently \"npm:lint:*:fix\" --names \"fix:\"",
     "lint:js": "eslint .",
     "lint:js:fix": "eslint . --fix",
     "format": "yarn run format:js",
@@ -22,22 +22,24 @@
   },
   "dependencies": {
     "ember-cli-babel": "^7.26.11",
-    "ember-cli-htmlbars": "^6.1.0",
+    "ember-cli-htmlbars": "^6.2.0",
     "ember-fetch": "^8.1.1",
     "ember-simple-auth": "^4.2.2"
   },
   "devDependencies": {
-    "@babel/eslint-parser": "^7.18.2",
-    "@babel/plugin-proposal-decorators": "^7.18.6",
+    "@babel/eslint-parser": "^7.21.3",
+    "@babel/plugin-proposal-decorators": "^7.21.0",
     "@ember/optional-features": "^2.0.0",
-    "@ember/test-helpers": "^2.8.1",
+    "@ember/string": "^3.0.1",
+    "@ember/test-helpers": "^2.9.3",
     "@embroider/test-setup": "^2.1.1",
     "@glimmer/component": "^1.1.2",
     "@glimmer/tracking": "^1.1.2",
     "broccoli-asset-rev": "^3.0.0",
+    "concurrently": "^8.0.1",
     "doctoc": "^2.2.0",
-    "ember-auto-import": "^2.4.3",
-    "ember-cli": "^4.4.1",
+    "ember-auto-import": "^2.6.3",
+    "ember-cli": "^4.12.2",
     "ember-cli-dependency-checker": "^3.3.1",
     "ember-cli-inject-live-reload": "^2.1.0",
     "ember-cli-sri": "^2.1.1",
@@ -47,23 +49,22 @@
     "ember-export-application-global": "^2.0.1",
     "ember-load-initializers": "^2.1.2",
     "ember-page-title": "^7.0.0",
-    "ember-qunit": "^6.0.0",
-    "ember-resolver": "^8.0.3",
-    "ember-source": "~4.4.0",
+    "ember-qunit": "^6.2.0",
+    "ember-resolver": "^10.0.0",
+    "ember-source": "~4.12.0",
     "ember-source-channel-url": "^3.0.0",
-    "ember-template-lint": "^4.14.0",
-    "eslint": "^8.18.0",
-    "eslint-config-prettier": "^8.5.0",
-    "eslint-plugin-ember": "^10.6.1",
-    "eslint-plugin-node": "^11.1.0",
-    "eslint-plugin-qunit": "^7.3.0",
+    "ember-template-lint": "^5.7.2",
+    "eslint": "^8.37.0",
+    "eslint-config-prettier": "^8.8.0",
+    "eslint-plugin-ember": "^11.5.0",
+    "eslint-plugin-n": "^15.7.0",
+    "eslint-plugin-qunit": "^7.3.4",
     "loader.js": "^4.7.0",
-    "npm-run-all": "^4.1.5",
     "pretender": "^3.4.3",
-    "prettier": "^2.6.2",
-    "qunit": "^2.19.1",
+    "prettier": "^2.8.7",
+    "qunit": "^2.19.4",
     "qunit-dom": "^2.0.0",
-    "webpack": "^5.76.0"
+    "webpack": "^5.78.0"
   },
   "engines": {
     "node": "16.* || 18.*"
diff --git a/addons/auth/tests/dummy/config/ember-cli-update.json b/addons/auth/tests/dummy/config/ember-cli-update.json
index 6edef2fd2..0cd2d798c 100644
--- a/addons/auth/tests/dummy/config/ember-cli-update.json
+++ b/addons/auth/tests/dummy/config/ember-cli-update.json
@@ -3,7 +3,7 @@
   "packages": [
     {
       "name": "ember-cli",
-      "version": "4.4.1",
+      "version": "4.12.2",
       "blueprints": [
         {
           "name": "addon",
diff --git a/addons/auth/config/ember-try.js b/addons/auth/tests/dummy/config/ember-try.js
similarity index 94%
rename from addons/auth/config/ember-try.js
rename to addons/auth/tests/dummy/config/ember-try.js
index 369ac9b0d..70285361c 100644
--- a/addons/auth/config/ember-try.js
+++ b/addons/auth/tests/dummy/config/ember-try.js
@@ -11,14 +11,6 @@ const { embroiderSafe, embroiderOptimized } = require('@embroider/test-setup');
 module.exports = async function () {
   return {
     scenarios: [
-      {
-        name: 'ember-lts-3.28',
-        npm: {
-          devDependencies: {
-            'ember-source': '~3.28.0',
-          },
-        },
-      },
       {
         name: 'ember-lts-4.4',
         npm: {
@@ -27,6 +19,14 @@ module.exports = async function () {
           },
         },
       },
+      {
+        name: 'ember-lts-4.8',
+        npm: {
+          devDependencies: {
+            'ember-source': '~4.8.0',
+          },
+        },
+      },
       {
         name: 'ember-release',
         npm: {
diff --git a/addons/auth/tests/dummy/config/environment.js b/addons/auth/tests/dummy/config/environment.js
index b08b418a3..94d153ed3 100644
--- a/addons/auth/tests/dummy/config/environment.js
+++ b/addons/auth/tests/dummy/config/environment.js
@@ -6,20 +6,17 @@
 'use strict';
 
 module.exports = function (environment) {
-  let ENV = {
+  const ENV = {
     modulePrefix: 'dummy',
     environment,
     rootURL: '/',
     locationType: 'history',
     EmberENV: {
+      EXTEND_PROTOTYPES: false,
       FEATURES: {
         // Here you can enable experimental features on an ember canary build
         // e.g. EMBER_NATIVE_DECORATOR_SUPPORT: true
       },
-      EXTEND_PROTOTYPES: {
-        // Prevent Ember Data from overriding Date.parse.
-        Date: false,
-      },
     },
 
     APP: {
diff --git a/addons/auth/vendor/.gitkeep b/addons/auth/vendor/.gitkeep
deleted file mode 100644
index e69de29bb..000000000
diff --git a/yarn.lock b/yarn.lock
index ca310660f..ee1d9a323 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9665,7 +9665,7 @@ ember-auto-import@^1.11.2, ember-auto-import@^1.12.0:
     walk-sync "^0.3.3"
     webpack "^4.43.0"
 
-ember-auto-import@^2.2.3, ember-auto-import@^2.4.0, ember-auto-import@^2.4.1, ember-auto-import@^2.4.2, ember-auto-import@^2.4.3, ember-auto-import@^2.5.0, ember-auto-import@^2.6.0, ember-auto-import@^2.6.1, ember-auto-import@^2.6.3:
+ember-auto-import@^2.2.3, ember-auto-import@^2.4.0, ember-auto-import@^2.4.1, ember-auto-import@^2.4.2, ember-auto-import@^2.5.0, ember-auto-import@^2.6.0, ember-auto-import@^2.6.1, ember-auto-import@^2.6.3:
   version "2.6.3"
   resolved "https://registry.yarnpkg.com/ember-auto-import/-/ember-auto-import-2.6.3.tgz#f18d1b93dd10b08ba5496518436f9d56dd4e000a"
   integrity sha512-uLhrRDJYWCRvQ4JQ1e64XlSrqAKSd6PXaJ9ZsZI6Tlms9T4DtQFxNXasqji2ZRJBVrxEoLCRYX3RTldsQ0vNGQ==
@@ -10352,6 +10352,105 @@ ember-cli@^4.12.1:
     workerpool "^6.4.0"
     yam "^1.0.0"
 
+ember-cli@^4.12.2:
+  version "4.12.2"
+  resolved "https://registry.yarnpkg.com/ember-cli/-/ember-cli-4.12.2.tgz#a9d2dd191093fcf18122732fae8999c9ca873447"
+  integrity sha512-990UglceEsB3nd/pTI08wL+hbApICrd6P4BO88486rSf9r3XjZ7LBcD318N8I1AGe5IUDkbccMrOQxoHge6zNg==
+  dependencies:
+    "@babel/core" "^7.21.0"
+    "@babel/plugin-transform-modules-amd" "^7.20.11"
+    amd-name-resolver "^1.3.1"
+    babel-plugin-module-resolver "^4.1.0"
+    bower-config "^1.4.3"
+    bower-endpoint-parser "0.2.2"
+    broccoli "^3.5.2"
+    broccoli-amd-funnel "^2.0.1"
+    broccoli-babel-transpiler "^7.8.1"
+    broccoli-builder "^0.18.14"
+    broccoli-concat "^4.2.5"
+    broccoli-config-loader "^1.0.1"
+    broccoli-config-replace "^1.1.2"
+    broccoli-debug "^0.6.5"
+    broccoli-funnel "^3.0.8"
+    broccoli-funnel-reducer "^1.0.0"
+    broccoli-merge-trees "^4.2.0"
+    broccoli-middleware "^2.1.1"
+    broccoli-slow-trees "^3.1.0"
+    broccoli-source "^3.0.1"
+    broccoli-stew "^3.0.0"
+    calculate-cache-key-for-tree "^2.0.0"
+    capture-exit "^2.0.0"
+    chalk "^4.1.2"
+    ci-info "^3.7.0"
+    clean-base-url "^1.0.0"
+    compression "^1.7.4"
+    configstore "^5.0.1"
+    console-ui "^3.1.2"
+    core-object "^3.1.5"
+    dag-map "^2.0.2"
+    diff "^5.1.0"
+    ember-cli-is-package-missing "^1.0.0"
+    ember-cli-lodash-subset "^2.0.1"
+    ember-cli-normalize-entity-name "^1.0.0"
+    ember-cli-preprocess-registry "^3.3.0"
+    ember-cli-string-utils "^1.1.0"
+    ensure-posix-path "^1.1.1"
+    execa "^5.1.1"
+    exit "^0.1.2"
+    express "^4.18.1"
+    filesize "^10.0.5"
+    find-up "^5.0.0"
+    find-yarn-workspace-root "^2.0.0"
+    fixturify-project "^2.1.1"
+    fs-extra "^11.1.0"
+    fs-tree-diff "^2.0.1"
+    get-caller-file "^2.0.5"
+    git-repo-info "^2.1.1"
+    glob "^8.1.0"
+    heimdalljs "^0.2.6"
+    heimdalljs-fs-monitor "^1.1.1"
+    heimdalljs-graph "^1.0.0"
+    heimdalljs-logger "^0.1.10"
+    http-proxy "^1.18.1"
+    inflection "^2.0.1"
+    inquirer "^8.2.1"
+    is-git-url "^1.0.0"
+    is-language-code "^3.1.0"
+    isbinaryfile "^5.0.0"
+    js-yaml "^4.1.0"
+    leek "0.0.24"
+    lodash.template "^4.5.0"
+    markdown-it "^13.0.1"
+    markdown-it-terminal "^0.4.0"
+    minimatch "^7.4.1"
+    morgan "^1.10.0"
+    nopt "^3.0.6"
+    npm-package-arg "^10.1.0"
+    os-locale "^5.0.0"
+    p-defer "^3.0.0"
+    portfinder "^1.0.32"
+    promise-map-series "^0.3.0"
+    promise.hash.helper "^1.0.8"
+    quick-temp "^0.1.8"
+    remove-types "^1.0.0"
+    resolve "^1.22.1"
+    resolve-package-path "^4.0.3"
+    safe-stable-stringify "^2.4.2"
+    sane "^5.0.1"
+    semver "^7.3.5"
+    silent-error "^1.1.1"
+    sort-package-json "^1.57.0"
+    symlink-or-copy "^1.3.1"
+    temp "0.9.4"
+    testem "^3.10.1"
+    tiny-lr "^2.0.0"
+    tree-sync "^2.1.0"
+    uuid "^9.0.0"
+    walk-sync "^3.0.0"
+    watch-detector "^1.0.2"
+    workerpool "^6.4.0"
+    yam "^1.0.0"
+
 ember-cli@^4.4.1:
   version "4.8.0"
   resolved "https://registry.yarnpkg.com/ember-cli/-/ember-cli-4.8.0.tgz#71988bdad50661b904f7121a566799027c07ba72"
@@ -18074,7 +18173,7 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@^2.5.1, prettier@^2.6.2, prettier@^2.7.1:
+prettier@^2.5.1, prettier@^2.7.1:
   version "2.7.1"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.7.1.tgz#e235806850d057f97bb08368a4f7d899f7760c64"
   integrity sha512-ujppO+MkdPqoVINuDFDRLClm7D78qbDt0/NR+wp5FqEZOoTNAjPHWj17QRhu7geIHJfcNhRk1XVQmF8Bp3ye+g==