golang: comparison of libraries pgx, sqlx, gorm libraries: "github.com/jackc/pgx" "github.com/jmoiron/sqlx" with "github.com/jackc/pgx" "github.com/jmoiron/sqlx" with "github.com/lib/pq" "github.com/jinzhu/gorm"