updated node version

Author: fileformat

package.json

@@ -9,7 +9,7 @@
     "express": "^4.15.4"
   },
   "engines": {
-    "node": "8.1.4"
+    "node": "8.11.3"
   },
   "repository": {
     "url": "https://www.github.com/fileformat/regexplanet-xregexp"