Merge pull request #604 from parity-js/dependabot/npm_and_yarn/react-dom-16.12.0

Author: dependabot-preview[bot]

package-lock.json

@@ -200,7 +200,7 @@
     "prop-types": "15.7.2",
     "query-string": "6.8.3",
     "react": "16.11.0",
-    "react-dom": "16.10.2",
+    "react-dom": "16.12.0",
     "react-intl": "3.4.0",
     "react-markdown": "4.2.2",
     "react-progress-bar.js": "0.2.3",