fix: upgrade react-dom due to vulnerability

Author: streamich

package.json

@@ -59,7 +59,7 @@
     "prettier": "1.13.5",
     "prop-types": "15.6.1",
     "react": "16.2.0",
-    "react-dom": "16.2.0",
+    "react-dom": "16.2.1",
     "react-test-renderer": "15.6.2",
     "rimraf": "2.6.2",
     "source-map-support": "0.5.6",