fix(package): update validator to version 12.0.0

Closes #245

Author: greenkeeper[bot]

package.json

@@ -57,7 +57,7 @@
     "shortid": "^2.2.6",
     "superagent": "^3.5.0",
     "utils-merge": "^1.0.0",
-    "validator": "^9.0.0",
+    "validator": "^12.0.0",
     "wotcity.io": "^0.8.14",
     "youmeb-generator": "0.0.1"
   },