chore: revert version of node removal

DSchau · DSchau · commit f996a33618be · 2018-09-26T14:02:12.000-05:00
diff --git a/package.json b/package.json
@@ -56,6 +56,7 @@
     "unist-util-visit": "^1.1.3"
   },
   "engines": {
+    "node": "^8.4.0",
     "yarn": "^1.3.2"
   },
   "homepage": "https://reactjs.org/",
