has_many_polymorphs bugfix release

Get version 18 from the usual place.


Now also fixed a bug where doubly polymorphic parents weren’t being strict about which children they returned (thanks to Xardion and Agile for the discovery).

what’s changed

Now it has no more bugs. You may uncross your fingers. Thanks goes to Hildolfur for putting the plugin through the wringer and revealing the last three problems.