fix(package): update validator to version 8.1.0

Closes #12

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
     "handlebars": "^4.0.5",
     "jquery": "^3.1.1",
     "socket.io-client": "^2.0.0",
-    "validator": "^7.0.0"
+    "validator": "^8.1.0"
   },
   "config": {
     "commitizen": {