`pgroll` currently uses `timestamp without timezone` for `created_at`, `updated_at` columns in the migrations table. However, using [timestamp with timezone](https://wiki.postgresql.org/wiki/Don%27t_Do_This#Don.27t_use_timestamp_.28without_time_zone.29). This is an issue as the clients consuming these fields from `pgroll` need to add additional information for the dates to be parsed as UTC.