Date comparison doesn't work with strings about mingo HOT 3 CLOSED

var Mingo = require("mingo");

var data = [
    {"id":1, "postedAt":"2017-01-04T15:00:00.000Z"},
    {"id":2, "postedAt":"2017-01-14T14:59:59.999Z"}
];

var res = Mingo.find(data, {
  "postedAt":{
    "$gte":"2017-01-04T15:00:00.000Z",
    "$lt":"2017-01-14T14:59:59.999Z"
  }
}).all();

console.log(JSON.stringify(res)); // "[{\"id\":1,\"postedAt\":\"2017-01-04T15:00:00.000Z\"}]"

> db.test.find()
{ "_id" : ObjectId("587d9eef3361cf408b6784ab"), "postedAt" : "2017-01-04T15:00:00.000Z", "name" : 100 }
{ "_id" : ObjectId("587d9eff3361cf408b6784ac"), "postedAt" : "2017-01-14T14:59:59.999Z", "name" : 200 }
> db.test.find({
...   "postedAt":{
...     "$gte":"2017-01-04T15:00:00.000Z",
...     "$lt":"2017-01-14T14:59:59.999Z"
...   }
... })
{ "_id" : ObjectId("587d9eef3361cf408b6784ab"), "postedAt" : "2017-01-04T15:00:00.000Z", "name" : 100 }