update to the latest major version of @testing-library/dom

We are not using any of the features which were removed or changed in the new version.

The new version also removes the need for the hack.js file we needed to use this is because, the package is using the latest major versio of pretty-format, which contains this update jestjs/jest#11569

Author: JakeChampion

package-lock.json

@@ -20,7 +20,7 @@
 	"type": "module",
 	"browser": "main.js",
 	"devDependencies": {
-		"@testing-library/dom": "^7.31.2",
+		"@testing-library/dom": "^8.0.0",
 		"@testing-library/user-event": "^13.1.9",
 		"chai": "^4.3.4",
 		"eslint": "^7.26.0",

package.json

@@ -1,6 +1,5 @@
 /* eslint-env mocha */
 /* global sinon */
-import './helpers/hack.js';
 import * as fixtures from './helpers/fixtures.js';
 import Autocomplete from '../../main.js';
 import { screen, getByRole } from '@testing-library/dom';