Can not use `geo_types::Polygon` in statements

[emirhantasdeviren]

Hello,

I have postgres database with postgis extension and I have a column of geometry(polygon, 4326). Using with-geo-types-0_7 feature. However the geo_types::Polygon does not implement ToSql and FromSql traits.

As I see only Point, Rect and LineString are implemented in postgres-types.

What is the proper way to handle polygon geometry encoding/decoding in statements and results?