-[Fixed] Mark postgres connection as invalid if the connection is reset [#4661](https://github.com/sequelize/sequelize/pull/4661)
-[Fixed] Mark postgres connection as invalid if the connection is reset [#4661](https://github.com/sequelize/sequelize/pull/4661)
-[FIXED] Remove usage of "limit" in cases where it's unnecessary, which fixes some of the cases mentioned in [#4404](https://github.com/sequelize/sequelize/issues/4404)