Fix Cath/Chest handling for Afterbirth.
Fix Cath/Chest handling for Afterbirth.

Fixes #81

BrandonNowlin/RebirthItemTracker,viroulep/RebirthItemTracker,Hyphen-ated/RebirthItemTrackerTest,BrandonNowlin/RebirthItemTracker,Zamiell/RebirthItemTracker,sillypears/RebirthItemTracker,Hyphen-ated/RebirthItemTracker,viroulep/RebirthItemTracker