Merge pull request #2247 from atom/dependabot/npm_and_yarn/react-dom-16.9.0

Bump react-dom from 16.8.6 to 16.9.0

Author: smashwilson

package-lock.json

@@ -63,7 +63,7 @@
     "node-emoji": "1.10.0",
     "prop-types": "15.7.2",
     "react": "16.9.0",
-    "react-dom": "16.8.6",
+    "react-dom": "16.9.0",
     "react-relay": "5.0.0",
     "react-select": "1.2.1",
     "react-tabs": "^3.0.0",