Update react-testing-library (#29061)

* Update react-testing-library

* Update package.json

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

* Update lockfile

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

package.json

@@ -76,8 +76,8 @@
     "@grafana/api-extractor": "7.10.1",
     "@grafana/eslint-config": "2.0.5",
     "@rtsao/plugin-proposal-class-properties": "7.0.1-patch.1",
-    "@testing-library/jest-dom": "^5.11.3",
-    "@testing-library/react": "^10.4.8",
+    "@testing-library/jest-dom": "5.11.5",
+    "@testing-library/react": "11.1.2",
     "@testing-library/react-hooks": "^3.2.1",
     "@testing-library/user-event": "^12.1.3",
     "@types/angular": "1.6.56",