Range queries produces with deprecated from/to syntax

[pmalekn]

Which version of Elastic are you using?

[ ] elastic.v7 (for Elasticsearch 7.x)
[x] elastic.v6 (for Elasticsearch 6.x)
[ ] elastic.v5 (for Elasticsearch 5.x)
[ ] elastic.v3 (for Elasticsearch 2.x)
[ ] elastic.v2 (for Elasticsearch 1.x)

Please describe the expected behavior

Package should produce range query with gt, gte, lt, lte etc. fields

Please describe the actual behavior

Package produces range query with from, to, etc.

A comment from elasticsearch repo mentioning that this was already deprecated in 0.90.4
elastic/elasticsearch#48538 (comment)

and a related issue from 2016
#196

Any steps to reproduce the behavior?

Create a range query with lower limit .Gte() or upper limit .Lte() and observe the produced source.

[olivere]

Duplicate of #1187.

While it might be deprecated, it doesn't log a deprecation warning and is still alive and kicking, even in 7.5.