v0.19.2

This release disables entity manager clearing in Doctrine ORM result set factory - temporarily, until a better, non-breaking solution is found. Previous implementation was breaking applications that loaded entities into Doctrine's UnitOfWork, rendered the data tables, and then tried to access those entities - the result set factory was clearing on each batch, removing them from UoW.

Unfortunately, this means that the performance of large exports will be significantly worse, until a better solution for opt-in configurable clearing is implemented.