fix(deps): update dependency @testing-library/jest-dom to v5 (#139)

Author: ScriptedAlchemy

manual/website4/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "@testing-library/jest-dom": "^4.2.4",
+    "@testing-library/jest-dom": "^5.0.0",
     "@testing-library/react": "^9.3.2",
     "@testing-library/user-event": "^7.1.2",
     "react": "^16.12.0",