update to ember-qunit 5

package.json

@@ -42,34 +42,36 @@
   },
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",
+    "@ember/test-helpers": "~2.2.1",
     "@html-next/flexi-default-styles": "^2.2.0",
     "babel-eslint": "^10.1.0",
     "broccoli-asset-rev": "^3.0.0",
-    "ember-cli": "~3.26.1",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-github-pages": "^0.2.2",
     "ember-cli-inject-live-reload": "^2.0.2",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-uglify": "^3.0.0",
+    "ember-cli": "~3.26.1",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.1",
     "ember-load-initializers": "^2.1.2",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-power-select": "^4.1.2",
-    "ember-qunit": "^4.6.0",
+    "ember-qunit": "~5.1.3",
     "ember-raf-test-waiter": "^0.1.0",
     "ember-resolver": "^8.0.2",
-    "ember-source": "~3.27.1",
     "ember-source-channel-url": "^3.0.0",
+    "ember-source": "~3.27.1",
     "ember-try": "^1.4.0",
-    "eslint": "^7.26.0",
     "eslint-plugin-ember": "^9.6.0",
     "eslint-plugin-node": "^11.1.0",
+    "eslint": "^7.26.0",
     "flexi": "^2.1.0",
     "loader.js": "^4.7.0",
+    "qunit": "~2.14.0",
     "qunit-dom": "^1.6.0",
-    "release-it": "^14.6.2",
-    "release-it-lerna-changelog": "^3.1.0"
+    "release-it-lerna-changelog": "^3.1.0",
+    "release-it": "^14.6.2"
   },
   "resolutions": {
     "@embroider/util": "^0.40.0",

tests/index.html

@@ -34,6 +34,13 @@
     {{content-for "body"}}
     {{content-for "test-body"}}
 
+    <div id="qunit"></div>
+    <div id="qunit-fixture">
+      <div id="ember-testing-container">
+        <div id="ember-testing"></div>
+      </div>
+    </div>
+
     <script src="/testem.js" integrity=""></script>
     <script src="{{rootURL}}assets/vendor.js"></script>
     <script src="{{rootURL}}assets/test-support.js"></script>

tests/test-helper.js

@@ -3,9 +3,14 @@ import { registerWaiter } from 'ember-raf-test-waiter';
 import config from '../config/environment';
 import { setApplication } from '@ember/test-helpers';
 import { start } from 'ember-qunit';
+import * as QUnit from 'qunit';
+import { setup } from 'qunit-dom';
 
-registerWaiter();
+
+setup(QUnit.assert);
 
 setApplication(Application.create(config.APP));
 
+registerWaiter();
+
 start();