Memory and speed optimizations

add go1.18 to test.yml

fix json.RawMessage panic

Refactor WithContext to make it work without cloning the session and add `ConnMaxIdleTime`

allow using db.Result as subquery

upgrade pgx and pgtype deps

optimize `prepareQueryForDisplay`

Improvements for more customizable structured logging

Add test for canceled context and `Save`

cockroachdb: set default port

Update default sslmode