Support for unsigned_long Type in Elasticsearch Mapping

[brfuat9]

While creating migrations, we often utilize the long type for numeric fields. However, it seems there is no unsigned_long type option available in the mapping configurations. This feature would be highly beneficial, especially for cases where we only deal with positive numeric values and need to maximize the range of values stored. Thanks.

https://www.elastic.co/guide/en/elasticsearch/reference/current/number.html