Add an extra test for shrinkable::filter
Add an extra test for shrinkable::filter

whoshuu/rapidcheck,emil-e/rapidcheck,whoshuu/rapidcheck,tm604/rapidcheck,whoshuu/rapidcheck,unapiedra/rapidfuzz,emil-e/rapidcheck,tm604/rapidcheck,unapiedra/rapidfuzz,unapiedra/rapidfuzz,emil-e/rapidcheck,tm604/rapidcheck