passes timestampsInSnapshots to Firestore.settings() to prevent warning

[kitfit-dave]

Fixes /issues/38

[kitfit-dave]

Oh yeah, so, would have to actually support the Timestamp type as well (if there are any in the firestore that you want to backup and restore)

[wata]

This PR solves a bug where the timestamp type will always be the current date.

[kitfit-dave]

Does it? Woohoo. :).

I don’t think Timestamp type is properly supported yet anyway, it doesn’t not get detected like other types (or the old date type), and is just treated like an object. It gets backed up, but I’ve not checked what it restores as (I don’t use any timestamps in any collections worth backing up).

[wata]

Thank you for your reply.

Yes, it is a bug that occurs when restore.

This creationDate will change to the current date on firestore.

backup.json

{
  "creationDate": {
    "type": "timestamp",
    "value": "2018-11-22T02:42:13.058Z"
  },
  "id": {
    "type": "string",
    "value": "Yy4vNitGnrCRJR849EWW"
  },
  ...