chore: add @testing-library/dom to devDependencies (#305)

Author: MichaelDeBoey

package.json

@@ -45,6 +45,7 @@
     "requireindex": "^1.2.0"
   },
   "devDependencies": {
+    "@testing-library/dom": "^9.3.0",
     "@typescript-eslint/parser": "^5.9.1",
     "eslint": "^8.7.0",
     "eslint-doc-generator": "^1.0.0",