chore(deps): update react monorepo to v16.6.2

Author: renovate-bot

package.json

@@ -59,9 +59,9 @@
     "lint-staged": "6.1.0",
     "normalize.css": "8.0.0",
     "prettier": "1.10.2",
-    "react": "16.2.0",
-    "react-dom": "16.2.0",
-    "react-test-renderer": "16.2.0",
+    "react": "16.6.2",
+    "react-dom": "16.6.2",
+    "react-test-renderer": "16.6.2",
     "styled-components": "3.1.4"
   },
   "babel": {