Update dependency @types/react-dom to v16.9.6

Author: renovate-bot

{{ cookiecutter.project_slug }}/client/package-lock.json

@@ -28,7 +28,7 @@
     "@types/jest": "25.1.4",
     "@types/reach__router": "1.3.1",
     "@types/react": "16.9.31",
-    "@types/react-dom": "16.9.5",
+    "@types/react-dom": "16.9.6",
     "@types/react-redux": "7.1.7",
     "@types/styled-components": "5.0.1",
     "@types/use-persisted-state": "0.3.0",