Prevent moment deprecation warning (#2089)

lib/util.js

@@ -415,7 +415,7 @@ exports.convert = function (object, type) {
           return new Date(Number(match[1])); // parse number
         }
         else {
-          return moment(object).toDate(); // parse string
+          return moment(new Date(object)).toDate(); // parse string
         }
       }
       else {