Merge pull request #71 from LeetCode-OpenSource/greenkeeper/monorepo.react-20190809090221

Update react to the latest version 🚀

Author: Brooooooklyn

package.json

@@ -36,9 +36,9 @@
     "jest": "^24.8.0",
     "lint-staged": "^9.0.0",
     "prettier": "^1.17.1",
-    "react": "16.8.6",
-    "react-dom": "16.8.6",
-    "react-test-renderer": "16.8.6",
+    "react": "16.9.0",
+    "react-dom": "16.9.0",
+    "react-test-renderer": "16.9.0",
     "rxjs": "^6.5.2",
     "sinon": "^7.3.2",
     "source-map-loader": "^0.2.4",